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Successfully generated as following: http://localhost:1200/inspirehep/literature/witten - Success ✔️<?xml version="1.0" encoding="UTF-8"?>
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<title>Quantum groupoids from moduli spaces of $G$-bundles</title>
<description><span>In a previous work, we have constructed the Yangian $Y_\hbar (\mathfrak{d})$ of the cotangent Lie algebra $\mathfrak{d}=T^*\mathfrak{g}$ for a simple Lie algebra $\mathfrak{g}$, from the geometry of the equivariant affine Grassmanian associated to $G$ with $\mathfrak{g}=\mathrm{Lie}(G)$. In this paper, we construct a quantum groupoid $\Upsilon_\hbar^\sigma (\mathfrak{d})$ associated to $\mathfrak{d}$ over a formal neighbourhood of the moduli space of $G$-bundles and show that it is a dynamical twist of $Y_\hbar(\mathfrak{d})$. Using this dynamical twist, we construct a dynamical quantum spectral $R$-matrix, which essentially controls the meromorphic braiding of $\Upsilon_\hbar^\sigma (\mathfrak{d})$. This construction is motivated by the Hecke action of the equivariant affine Grassmanian on the moduli space of $G$-bundles in the setting of coherent sheaves. Heuristically speaking, the quantum groupoid $\Upsilon_\hbar^\sigma (\mathfrak{d})$ controls this action at a formal neighbourhood of a regularly stable $G$-bundle. From the work of Costello-Witten-Yamazaki, it is expected that this Hecke action should give rise to a dynamical integrable system. Our result gives a mathematical confirmation of this and an explicit $R$-matrix underlying the integrability.</span></description>
<link>https://inspirehep.net/literature/2846792</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2846792</guid>
<pubDate>Mon, 11 Nov 2024 04:09:20 GMT</pubDate>
<author>Raschid Abedin, Wenjun Niu</author>
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<title>Flat-space limit of defect correlators and stringy AdS form factors</title>
<description><span>We study AdS form factors, given by the Mellin representation for CFT correlators of local operators in the presence of extended defects. We propose a formula for taking (and expanding around) the flat-space limit. This formula relates the flat-space form factors for particles scattering off an extended object to the high-energy limit of the Mellin amplitude, via a Borel transform. We check the validity of our proposal in a number of examples. As an application, we study the two-point function of local operators in the presence of a 't Hooft loop in 4d $\mathcal{N}=4$ SYM, and compute the first few orders of stringy corrections to the AdS form factor of gravitons scattering off a D1 brane.</span></description>
<link>https://inspirehep.net/literature/2846396</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2846396</guid>
<pubDate>Fri, 08 Nov 2024 10:19:45 GMT</pubDate>
<author>Luis F. Alday (Oxford U., Inst. Math.), Xinan Zhou (Beijing, KITPC, ShanghaiTech U.)</author>
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<title>TsT-Generated Solutions in Type IIB Supergravity from Twisted Compactification of AdS$_5\times$T$^{1,1}$</title>
<description><span>This paper investigates marginal and dipole TsT transformations of a seed type IIB supergravity solution dual to a supersymmetry-preserving deformation of the Klebanov-Witten 4d SCFT. To explore key properties of the deformed theories, we holographically analyze various observables, including Wilson loops, 't Hooft loops, Entanglement Entropy, and holographic central charge flow. Moreover, we focus on detecting which of these observables are affected by the dynamics of the Kaluza-Klein (KK) modes resulting from the circle compactification.</span></description>
<link>https://inspirehep.net/literature/2846395</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2846395</guid>
<pubDate>Fri, 08 Nov 2024 10:19:39 GMT</pubDate>
<author>Federico Castellani (Florence U., INFN, Florence)</author>
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<title>Tannakian QFT: from spark algebras to quantum groups</title>
<description><span>We propose a nonperturbative construction of Hopf algebras that represent categories of line operators in topological quantum field theory, in terms of semi-extended operators (spark algebras) on pairs of transverse topological boundary conditions. The construction is a direct implementation of Tannakian formalism in QFT. Focusing on d=3 dimensional theories, we find topological definitions of R-matrices, ribbon twists, and the Drinfeld double construction for generalized quantum groups. We illustrate our construction in finite-group gauge theory, and apply it to obtain new results for B-twisted 3d $\mathcal{N}=4$ gauge theories, a.k.a. equivariant Rozansky-Witten theory, or supergroup BF theory (including ordinary BF theory with compact gauge group). We reformulate our construction mathematically in terms of abelian and dg tensor categories, and discuss connections with Koszul duality.</span></description>
<link>https://inspirehep.net/literature/2846365</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2846365</guid>
<pubDate>Fri, 08 Nov 2024 10:17:34 GMT</pubDate>
<author>Tudor Dimofte, Wenjun Niu</author>
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<title>Rod Structures and Patching Matrices: a review</title>
<description><span>I review the twistor theory construction of stationary and axisymmetric, Lorentzian signature solutions of the Einstein vacuum equations and the related toric Ricci-flat metrics of Riemannian signature, \cite{W,MW,F,FW}. The construction arises from the Ward construction \cite{W2} of anti-self-dual Yang-Mills fields as holomorphic vector bundles on twistor space, with the observation of Witten \cite{LW} that the Einstein equations for these metrics include the anti-self-dual Yang-Mills equations. The principal datum for a solution is the holomorphic patching matrix $P$ for a holomorphic vector bundle on a reduced twistor space, and $P$ is typically simpler than the corresponding metric to write down. I give a catalogue of examples, building on earlier collections \cite{F,AG}, and consider the inverse problem: how far does the rod structure of such a metric, together with its asymptotics, determine $P$?</span></description>
<link>https://inspirehep.net/literature/2845364</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2845364</guid>
<pubDate>Tue, 05 Nov 2024 16:18:18 GMT</pubDate>
<author>Paul Tod</author>
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<title>Classical and quantum curves of 5d Seiberg's theories and their 4d limit</title>
<description><span>In this work, we examine the classical and quantum Seiberg-Witten curves of 5d N = 1 SCFTs and their 4d limits. The 5d theories we consider are Seiberg's theories of type $E_{6,7,8}$, which serve as the UV completions of 5d SU(2) gauge theories with 5, 6, or 7 flavors. Their classical curves can be constructed using the five-brane web construction [1]. We also use it to re-derive their quantum curves [2], by employing a q-analogue of the Frobenius method in the style of [3]. This allows us to compare the reduction of these 5d curves with the 4d curves, i.e. Seiberg-Witten curves of the Minahan-Nemeschansky theories and their quantization, which have been identified in [4] with the spectral curves of rank-1 complex crystallographic elliptic Calogero-Moser systems.</span></description>
<link>https://inspirehep.net/literature/2845313</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2845313</guid>
<pubDate>Tue, 05 Nov 2024 16:15:05 GMT</pubDate>
<author>Oleg Chalykh (Leeds U., Math.), Yongchao Lü (Korea Inst. Advanced Study, Seoul)</author>
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<title>The 5d Tangram: Brane Webs, 7-Branes and Primitive T-cones</title>
<description><span>Two highly successful approaches to constructing 5d SCFTs are geometric engineering using M-theory on a Calabi-Yau 3-fold and the use of 5-brane webs suspended from 7-branes in Type IIB string theory. In the brane web realization, the extended Coulomb branch of the 5d SCFT can be studied by opening the web using rigid triple intersections of branes--i.e. configurations with no deformations. In this paper, we argue that the geometric engineering counterpart of these rigid triple intersections are the T-cones introduced in the mathematical literature. We extend the class of rigid brane webs to include locked superpositions of the minimal ones. These rigid brane webs serve as fundamental building blocks for supersymmetrically tessellating Generalized Toric Polygons (GTPs) from first principles. Interestingly, we find that the extended Coulomb branch generally exhibits a structure consisting of multiple cones intersecting at a single point. Hanany-Witten (HW) transitions in the web have been conjectured to correspond geometrically to flat fibrations over a line, where the central and generic fibers represent the geometries dual to the webs before and after the transition. We demonstrate this explicitly in an example, showing that for GTPs reducing to standard toric diagrams, the HW transition corresponds to a deformation of the BPS quiver that we map to the geometric deformation.</span></description>
<link>https://inspirehep.net/literature/2845300</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2845300</guid>
<pubDate>Tue, 05 Nov 2024 16:14:22 GMT</pubDate>
<author>Ignacio Carreño Bolla (Oviedo U., ICTEA, Oviedo), Sebastián Franco (City Coll., N.Y., CUNY, Graduate School - U. Ctr.), Diego Rodríguez-Gómez (Oviedo U., ICTEA, Oviedo)</author>
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<title>Topological 4D gravity and gravitational defects Topological 4D gravity and gravitational defects</title>
<description><span>Using the Chern-Simons formulation of AdS$_{3}$ gravity as well as the Costello-Witten-Yamazaki (CWY) theory for quantum integrability, we construct a novel topological 4D gravity given by equation (5.1) with observables based on gravitational gauge field holonomies. The field action S4Dgravof this gravity has a gauge symmetry SL(2,C)and reads also as the difference S4DCWYL−S4DCWYRwith 4D Chern-Simons field actions S4DCWYL/Rgiven by left/right CWY theory equation (3.9). We also use this 4D gravity derivation to build observables describing gravitational topological defects and their interactions. We conclude our study with few comments regarding quantum integrability and the extension of AdS$_{3}$/CFT$_{2}$ correspondence with regard to the obtained topological 4D gravity.</span><br><span>Using the Chern-Simons formulation of AdS3 gravity as well as the Costello-Witten-Yamazaki (CWY) theory for quantum integrability, we construct a novel topological 4D gravity given by Eq(5.1) with observables based on gravitational gauge field holonomies. The field action $S^{grav}_{4D}$ of this gravity has a gauge symmetry $SL(2,\mathbb{C})$ and reads also as the difference $S^{CWY_{L}}_{4D}-S^{CWY_{R}}_{4D}$ with 4D Chern-Simons field actions $S^{CWY_{L/R}}_{4D}$ given by left/right CWY theory Eq(3.9). We also use this 4D gravity derivation to build observables describing gravitational topological defects and their interactions. We conclude our study with few comments regarding quantum integrability and the extension of AdS$_{3}$/CFT$_{2}$ correspondence with regard to the obtained topological 4D gravity.</span></description>
<link>https://inspirehep.net/literature/2844111</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2844111</guid>
<pubDate>Thu, 31 Oct 2024 15:38:13 GMT</pubDate>
<author>Y. Boujakhrout (Rabat U., CPM, Rabat), R. Sammani (Rabat U., CPM, Rabat), E.H. Saidi (Rabat U., CPM, Rabat)</author>
<category>AdS3 gravity and CS formulation</category>
<category>AdS3/CFT2</category>
<category>Line defects in CS and 4D gravity</category>
<category>Integrable spin chains and brane realisations in strings</category>
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<title>T-dual branes on hyperkähler manifolds</title>
<description><span>This submission is a PhD dissertation. Kapustin and Witten conjectured that there is a mirror symmetry relation between the hyperkähler structures on certain Higgs bundle moduli spaces. As a consequence, they conjecture an equivalence between categories of BBB and BAA-branes. At the classical level, this mirror symmetry is given by T-duality between semi-flat hyperkähler structures on algebraic integrable systems. In this thesis, we investigate the T-duality relation between hyperkähler structures and the corresponding branes on affine torus bundles. We use the techniques of generalized geometry to show that semi-flat hyperkähler structures are T-dual on algebraic integrable systems. We also describe T-duality for generalized branes. Motivated by Fourier-Mukai transform we upgrade the T-duality between generalized branes to T-duality of submanifolds endowed with U(1)-bundles and connections. This T-duality in the appropriate context specializes to T-duality between BBB and BAA-branes.</span></description>
<link>https://inspirehep.net/literature/2843706</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2843706</guid>
<pubDate>Wed, 30 Oct 2024 09:16:35 GMT</pubDate>
<author>Maria Anna Sisak</author>
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<title>Dynamical Axion Misalignment from the Witten Effect</title>
<description><span>We propose a relaxation mechanism for the initial misalignment angle of the pre-inflationary QCD axion with a large decay constant. The proposal addresses the challenges posed to the axion dark matter scenario by an overabundance of axions overclosing the Universe, as well as by isocurvature constraints. Many state-of-the-art experiments are searching for QCD axion dark matter with a decay constant as large as $10^{16}\,\mathrm{GeV}$, motivating the need for a theoretical framework such as ours. In our model, hidden sector magnetic monopoles generated in the early Universe give the axion a large mass via the Witten effect, causing early oscillations that reduce the misalignment angle and axion abundance. As the hidden gauge symmetry breaks, its monopoles confine via cosmic strings, dissipating energy into the Standard Model and leading to monopole-antimonopole annihilation. This removes the monopole-induced mass, leaving only the standard QCD term. We consider the symmetry breaking pattern of $\mathrm{SU}(2)' \to \mathrm{U}(1)' \to 1$, leading to monopole and string formation respectively. We calculate the monopole abundance, their interactions with the axion field, and the necessary conditions for monopole-induced axion oscillations, while accounting for UV instanton effects. We present three model variations based on different symmetry breaking scales and show that they can accommodate an axion decay constant of up to $10^{16}\,\mathrm{GeV}$ with an inflationary scale of $10^{15}\,\mathrm{GeV}$. The required alignment between monopole-induced and QCD axion potentials is achieved through a modest Nelson-Barr mechanism, avoiding overclosure without anthropic reasoning.</span></description>
<link>https://inspirehep.net/literature/2843514</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2843514</guid>
<pubDate>Wed, 30 Oct 2024 04:25:22 GMT</pubDate>
<author>Abhishek Banerjee (Maryland U.), Manuel A. Buen-Abad (Maryland U., Johns Hopkins U., Dual C-P Inst. High Energy Phys.)</author>
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<title>A gauge-invariant measure for gauge fields on <math altimg="si1.svg"><msup><mrow><mi mathvariant="double-struck">CP</mi></mrow><mrow><mn>2</mn></mrow>...</title>
<description><span>We consider four-dimensional non-Abelian gauge theory living on a complex projective space <math altimg="si1.svg"><msup><mrow><mi mathvariant="double-struck">CP</mi></mrow><mrow><mn>2</mn></mrow></msup></math> as a way of gaining insights into (3+1)-dimensional QCD. In particular, we use a complex parametrization of gauge fields on which gauge transformations act homogeneously. This allows us to factor out the gauge degrees of freedom from the volume element leading to a manifestly gauge-invariant measure for the gauge-orbit space (the space of all gauge potentials modulo gauge transformations). The terms appearing in the measure that are of particular interest are mass-like terms for the gauge-invariant modes of the gauge fields. Since these mass terms come with dimensional parameters they are significant in the context of dimensional transmutation. Moreover, the existence of local gauge-invariant mass terms on <math altimg="si1.svg"><msup><mrow><mi mathvariant="double-struck">CP</mi></mrow><mrow><mn>2</mn></mrow></msup></math> could be related to Schwinger-Dyson calculations of the soft gluon mass. Finally, we argue that there is a kinematic regime in which the theory can be approximated by a 4d Wess-Zumino-Witten (WZW) theory. This result can be used to draw similarities between the mechanism of confinement in four and (2+1) dimensions.</span><br><span>We consider four-dimensional non-Abelian gauge theory living on a complex projective space $\mathbb{CP}^2$ as a way of gaining insights into (3+1)-dimensional QCD. In particular, we use a complex parametrization of gauge fields on which gauge transformations act homogeneously. This allows us to factor out the gauge degrees of freedom from the volume element leading to a manifestly gauge-invariant measure for the gauge-orbit space (the space of all gauge potentials modulo gauge transformations). The terms appearing in the measure that are of particular interest are mass-like terms for the gauge-invariant modes of the gauge fields. Since these mass terms come with dimensional parameters they are significant in the context of dimensional transmutation. Moreover, the existence of local gauge-invariant mass terms on $\mathbb{CP}^2$ could be related to Schwinger-Dyson calculations of the soft gluon mass. Finally, we argue that there is a kinematic regime in which the theory can be approximated by a 4d Wess-Zumino-Witten (WZW) theory. This result can be used to draw similarities between the mechanism of confinement in four and (2+1) dimensions.</span></description>
<link>https://inspirehep.net/literature/2842560</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842560</guid>
<pubDate>Fri, 25 Oct 2024 04:21:44 GMT</pubDate>
<author>Antonina Maj (CUNY, Graduate School - U. Ctr., Lehman Coll., City Coll., N.Y., U. Montpellier, IMAG)</author>
<category>Non-perturbative methods for gauge theories</category>
<category>Gauge-invariant measure</category>
<category>Complex projective space</category>
<category>Wess-Zumino-Witten theory</category>
<category>Gluon propagator mass</category>
<category>Dimensional transmutation</category>
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<title>Topological 8d $\mathcal{N}=1$ Gauge Theory: Novel Floer Homologies, and $A_\infty$-categories of Six, Five, and Four-Manifolds</title>
<description><span>This work is a continuation of the program initiated in [arXiv:2311.18302]. We show how one can define novel gauge-theoretic (holomorphic) Floer homologies of seven, six, and five-manifolds, from the physics of a topologically-twisted 8d $\mathcal{N}=1$ gauge theory on a Spin$(7)$-manifold via its supersymmetric quantum mechanics interpretation. They are associated with $G_2$ instanton, Donaldson-Thomas, and Haydys-Witten configurations on the seven, six, and five-manifolds, respectively. We also show how one can define hyperkähler Floer homologies specified by hypercontact three-manifolds, and symplectic Floer homologies of instanton moduli spaces. In turn, this will allow us to derive Atiyah-Floer type dualities between the various gauge-theoretic Floer homologies and symplectic intersection Floer homologies of instanton moduli spaces. Via a 2d gauged Landau-Ginzburg model interpretation of the 8d theory, one can derive novel Fukaya-Seidel type $A_\infty$-categories that categorify Donaldson-Thomas, Haydys-Witten, and Vafa-Witten configurations on six, five, and four-manifolds, respectively, where an Atiyah-Floer type correspondence for the Donaldson-Thomas case can be established. Last but not least, topological invariance of the theory suggests a relation amongst these Floer homologies and Fukaya-Seidel type $A_\infty$-categories for certain Spin$(7)$-manifolds. Our work therefore furnishes purely physical proofs and generalizations of the conjectures by Donaldson-Thomas [2], Donaldson-Segal [3], Cherkis [4], Hohloch-Noetzel-Salamon [5], Salamon [6], Haydys [7], and Bousseau [8], and more.</span></description>
<link>https://inspirehep.net/literature/2842541</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842541</guid>
<pubDate>Fri, 25 Oct 2024 04:21:00 GMT</pubDate>
<author>Arif Er (Singapore Natl. U.), Meng-Chwan Tan (Singapore Natl. U.)</author>
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<title>Equivalence Relations on Vertex Operator Algebras, II: Witt Equivalence and Orbifolds</title>
<description><span>When can two strongly rational vertex operator algebras or 1+1d rational conformal field theories (RCFTs) be related by topological manipulations? For vertex operator algebras, the term "topological manipulations" refers to operations like passing to a conformal extension or restricting to a conformal subalgebra; for RCFTs, topological manipulations include operations like gauging (or orbifolding) a finite subpart of a generalized global symmetry or interpolating to a new theory via a topological line interface of finite quantum dimension. Inspired by results in the theory of even lattices, and also the theory of tensor categories, we say that two strongly rational vertex operator algebras are Witt equivalent if their central charges agree and if their representation categories are Witt equivalent as modular tensor categories. Two RCFTs are said to be Witt equivalent if their central charges agree and if their associated 2+1d topological field theories can be separated by a topological surface. We argue that Witt equivalence is necessary for two theories to be related by topological manipulations. We conjecture that it is also sufficient, and give proofs in various special cases. We relate this circle of ideas to the problem of classifying RCFTs, and to lore concerning deformation classes of quantum field theories. We use the notion of Witt equivalence to argue, assuming the conjectural classification of unitary, $c=1$ RCFTs, that all of the finite global symmetries of the $\mathrm{SU}(2)_1$ Wess-Zumino-Witten model are invertible. Finally, we sketch a "quantum Galois theory" for chiral CFTs, which generalizes prior mathematical literature by incorporating non-invertible symmetries; we illustrate this non-invertible Galois theory in the context of the monster CFT, for which we produce a Fibonacci symmetry.</span></description>
<link>https://inspirehep.net/literature/2842517</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842517</guid>
<pubDate>Fri, 25 Oct 2024 04:19:17 GMT</pubDate>
<author>Sven Möller, Brandon C. Rayhaun</author>
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<title>Holographic Generalised Gukov-Witten Defects</title>
<description><span>Spindle and disc solutions have received significant attention in recent literature. However, it is not entirely clear what these supergravity solutions represent in the dual SCFT. In this work we elucidate this issue by considering a different global completion of the spindle solution, focusing on a single conical defect. We argue that these solutions can be interpreted as the insertion of a single (generalised) Gukov-Witten defect in the bulk SCFT. We give compelling evidence for this claim by uplifting the solutions to type IIB supergravity and showing that the five-dimensional $\frac{1}{2}$-BPS solutions uplifts to the bubbling surface operators solutions. Their less supersymmetric cousins give rise to a large class of holographic generalised Gukov-Witten surface operators for which we perform a detailed geometric analysis. To corroborate these claims we compute a variety of holographic observables such as the renormalised action, stress tensor one-point function and defect entanglement entropy. In addition, we extend the holographic inflow mechanism to account for bulk-to-defect inflow to study the symmetries and anomalies of the bulk and defect.</span></description>
<link>https://inspirehep.net/literature/2842502</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842502</guid>
<pubDate>Fri, 25 Oct 2024 04:17:42 GMT</pubDate>
<author>Pieter Bomans (Oxford U., Inst. Math.), Lorenzo Tranchedone (Oxford U., Theor. Phys.)</author>
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<title>A geometrical description of untwisted Dijkgraaf-Witten TQFT with defects</title>
<description><span>We give a simple, geometric and explicit construction of 3d untwisted Dijkgraaf-Witten theory with defects of all codimensions. It is given as a symmetric monoidal functor from a defect cobordism category into the category of finite-dimensional complex vector spaces. The objects of this category are oriented stratified surfaces and its morphisms are equivalence classes of stratified cobordisms, both labelled with higher categorical data. This TQFT is constructed in terms of geometric quantities such as fundamental groupoids and bundles and requires neither state sums on triangulations nor diagrammatic calculi for higher categories. It is obtained from a functor that assigns to each defect surface a representation of a gauge groupoid and to each defect cobordism a fibrant span of groupoids and an intertwiner between the groupoid representations at its boundary. It is constructed by homotopy theoretic methods and allows for an explicit computation of examples. In particular, we show how the 2d part of this defect TQFT gives a simple description of defects of all codimensions in Kitaev's quantum double model.</span></description>
<link>https://inspirehep.net/literature/2842382</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842382</guid>
<pubDate>Thu, 24 Oct 2024 07:39:56 GMT</pubDate>
<author>João Faría Martins, Catherine Meusburger</author>
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<title>Surface observables in gauge theories, modular Painlevé tau functions and non-perturbative topological strings</title>
<description><span>We study BPS surface observables of $\mathcal{N}=2$ four dimensional $SU(2)$ gauge theory in gravitational $\Omega$-background at perturbative and at Argyres-Douglas superconformal fixed points. This is done by formulating the equivariant gauge theory on the blow-up of $\mathbb{C}^2$ and considering the decoupling Nekrasov-Shatashvili limit. We show that in this limit the blow-up equations are solved by corresponding Painlevé$\mathcal{T}$-functions and exploit operator/state correspondence to compute their expansion in an integer basis, given in terms of the moduli of the quantum Seiberg-Witten curve. We study the modular properties of these solutions and show that they do directly lead to BCOV holomorphic anomaly equations for the corresponding topological string partition function. The resulting $\mathcal{T}$-functions are holomorphic and modular and as such they provide a natural non-perturbative completion of topological strings partition functions.</span></description>
<link>https://inspirehep.net/literature/2842155</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842155</guid>
<pubDate>Thu, 24 Oct 2024 04:18:36 GMT</pubDate>
<author>Giulio Bonelli, Pavlo Gavrylenko, Ideal Majtara, Alessandro Tanzini</author>
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<title>Almost Hermitian structures on moduli spaces of non-Abelian monopoles and applications to the topology of symplectic four-manifolds</title>
<description><span>This work is a sequel to our previous monograph arXiv:2010.15789 (to appear in AMS Memoirs), where we initiated our program to prove that the Bogomolov-Miyaoka-Yau inequality holds for closed, symplectic four-manifolds and, more generally, for closed, smooth four-manifolds with a Seiberg-Witten basic class. This inequality was first proved for compact, complex surfaces of general type by Miyaoka (1977) and Yau (1978). Our approach uses a version of Morse theory for a natural Hamiltonian, the square of the $L^2$ norm of the coupled spinors, for the circle action on the moduli space of non-Abelian monopoles over a closed four-manifold. It has the aim of proving the existence of a projectively anti-self-dual connection on a rank-two Hermitian vector bundle over a blow-up of the four-manifold, where the first Pontrjagin number of the vector bundle is negative and greater than or equal to minus the Euler characteristic of the blown-up four-manifold. Our Morse theory argument relies on positivity of virtual Morse-Bott indices for critical points of Hamiltonians for circle actions on complex analytic spaces (or real analytic spaces that, locally, are sufficiently well-approximated by complex analytic model spaces), as developed by the first author in arXiv:2206.14710. In our application to the moduli space of non-Abelian monopoles, the critical points are fixed points of the circle action and thus represented by Seiberg-Witten monopoles.</span></description>
<link>https://inspirehep.net/literature/2841072</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2841072</guid>
<pubDate>Fri, 18 Oct 2024 05:52:07 GMT</pubDate>
<author>Paul M.N. Feehan, Thomas G. Leness</author>
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<title>Constraints on embedded spheres and real projective planes in 4-manifolds from Seiberg-Witten theory</title>
<description><span>We calculate the Seiberg-Witten invariants of branched covers of prime degree, where the branch locus consists of embedded spheres. Aside from the formula itself, our calculations give rise to some new constraints on configurations of embedded spheres in 4-manifolds. Using similar methods, we also obtain new constraints on embeddings of real projective planes and spheres with a cusp singularity. Moreover, we show that the existence of certain configurations of surfaces would give rise to 4-manifolds of non-simple type. Our proof makes use of equivariant Seiberg-Witten invariants as well as a gluing formula for the relative Seiberg-Witten invariants of 4-manifolds with positive scalar curvature boundary.</span></description>
<link>https://inspirehep.net/literature/2839920</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839920</guid>
<pubDate>Tue, 15 Oct 2024 06:56:59 GMT</pubDate>
<author>David Baraglia</author>
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<item>
<title>Web of Four-Dimensional Dualities and Symmetry Topological Field Theories</title>
<description><span>We study $\mathbb{Z}_N$ one-form center symmetries in four-dimensional gauge theories using the symmetry topological field theory (SymTFT). In this context, the associated TFT in the five-dimensional bulk is the BF model. We revisit its canonical quantization and construct topological boundary states on several important classes of four manifolds that are spin, non-spin and torsional. We highlight a web of four-dimensional dualities, which can be naturally interpreted within the SymTFT framework. We also point out an intriguing class of four-dimensional gauge theories that exhibit mixed 't Hooft anomaly between one-form symmetries. In the second part of this work, we extend the SymTFT to account for various quantities protected by supersymmetry (SUSY) in SUSY gauge theories. We proposed that their behaviour under various symmetry operations are entirely captured by the topological boundary of the SymTFT, resulting in strong constraints. Concrete examples are considered, including the Witten index, the lens space index and the Donaldson-Witten and Vafa-Witten partition functions.</span></description>
<link>https://inspirehep.net/literature/2839711</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839711</guid>
<pubDate>Tue, 15 Oct 2024 04:26:11 GMT</pubDate>
<author>Zhihao Duan (Queen Mary, U. of London (main)), Qiang Jia (Korea Inst. Advanced Study, Seoul, KAIST, Taejon), Sungjay Lee (Korea Inst. Advanced Study, Seoul)</author>
</item>
<item>
<title>Genus one mirror symmetry for intersection of two cubics in $\mathbb{P}^5$</title>
<description><span>This paper establishes BCOV-type genus one mirror symmetry for the intersections of two cubics in $\mathbb{P}^5$. The proof applies previous constructions of the mirror family by the second author and computations of genus one Gromov-Witten invariants by A. Popa. The approach adapts the strategy used for hypersurfaces, as developed by the first author and collaborators, but addresses the distinct geometry involved. A key feature is a systematic usage of toric techniques and related computer aided computations.</span></description>
<link>https://inspirehep.net/literature/2839505</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839505</guid>
<pubDate>Mon, 14 Oct 2024 05:54:03 GMT</pubDate>
<author>Dennis Eriksson, Mykola Pochekai</author>
</item>
<item>
<title>Witten diagrams in momentum space and one graviton exchange between scalars in Weyl invariant unimodular gravity</title>
<description><span>We tackle head-on the computation of the $s$-channel Witten diagram in momentum space corresponding to the exchange of a graviton between minimally coupled scalars in Weyl invariant unimodular gravity. By means of a lengthy calculation, we show first that the value of the diagram in question is the same as in General Relativity and, then, we obtain a compact expression for it in terms of the Mandelstam variables.</span></description>
<link>https://inspirehep.net/literature/2838983</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2838983</guid>
<pubDate>Fri, 11 Oct 2024 04:32:12 GMT</pubDate>
<author>J. Anero, Carmelo P. Martin</author>
</item>
<item>
<title>Classical Weight-Four L-value Ratios as Sums of Calabi--Yau Invariants</title>
<description><span>We revisit the series solutions of the attractor equations of 4d N=2 supergravities obtained by Calabi--Yau compactifications previously studied in Candelas, Kuusela, and McGovern (2021). While only convergent for a restricted set of black hole charges, we find that they are summable with Padé resummation providing a suitable method. By specialising these solutions to rank-two attractors, we obtain many conjectural identities of the type discovered in CKM. These equate ratios of weight-four special L-values with an infinite series whose summands are formed out of genus-0 Gromov--Witten invariants. We also present two new rank-two attractors which belong to moduli spaces each interesting in their own right. Each moduli space possesses two points of maximal unipotent monodromy. One has already been studied by Hosono and Takagi, and we discuss issues stemming from the associated L-function having nonzero rank.</span></description>
<link>https://inspirehep.net/literature/2838967</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2838967</guid>
<pubDate>Fri, 11 Oct 2024 04:31:17 GMT</pubDate>
<author>Philip Candelas (Oxford U., Inst. Math.), Xenia de la Ossa (Oxford U., Inst. Math.), Joseph McGovern (U. Melbourne (main))</author>
</item>
<item>
<title>Frozen Generalized Symmetries</title>
<description><span>M-theory frozen singularities are (locally) $D$- or $E$-type orbifold singularities with a background fractional $C_3$-monodromy surrounding them. In this paper, we revisit such backgrounds and address several puzzling features of their physics. We first give a top-down derivation of how the $D$- or $E$-type 7D $\mathcal{N}=1$ gauge theory directly ``freezes" to a lower rank gauge theory due to the $C_3$-background. This relies on a Hanany--Witten effect of fractional M5 branes and the presence of a gauge anomaly of fractional D$p$ probes in the circle reduction. Additionally, we compute defect groups and 8D symmetry topological field theories (SymTFTs) of the 7D frozen theories in several duality frames. We apply our results to understanding the evenness condition of strings ending on $O7^+$-planes, and calculating the global forms of supergravity gauge groups of M-theory compactified on $T^4/\Gamma$ with frozen singularities. In an Appendix, we also revisit IIA $ADE$ singularities with a $C_1$-monodromy along a 1-cycle in the boundary lens space and show that this freezes the gauge degrees-of-freedom via confinement.</span></description>
<link>https://inspirehep.net/literature/2838963</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2838963</guid>
<pubDate>Fri, 11 Oct 2024 04:30:59 GMT</pubDate>
<author>Mirjam Cvetič (Pennsylvania U., Dept. Math., Pennsylvania U., Maribor U.), Markus Dierigl (Munich U., ASC, CERN), Ling Lin (Bologna U., INFN, Bologna), Ethan Torres (CERN), Hao Y. Zhang (Tokyo U., IPMU)</author>
</item>
<item>
<title>Symmetry Breaking from Monopole Condensation in QED$_3$</title>
<description><span>QED in three dimensions with an $SU(2)_f$ doublet $\psi^i$ of massless, charge-1 Dirac fermions (and no Chern-Simons term) has a $U(2) = (SU(2)_f \times U(1)_m)/\mathbb{Z}_2$ symmetry that acts on gauge-invariant local operators, including monopole operators charged under $U(1)_m$. We establish that there are only two possible IR scenarios: either the theory flows to a CFT with $U(2)$ symmetry (a scenario strongly constrained by conformal bootstrap bounds); or it spontaneously breaks $U(2) \to U(1)$ via the condensation of a monopole operator of smallest $U(1)_m$ charge, which is a $U(2)$ doublet. This leads to three Nambu-Goldstone bosons described by a sigma model into a squashed three-sphere $S^3$ with $U(2)$ isometry. We further show that the conventional $SU(2)_f$-triplet order parameter $i \bar \psi \vec \sigma \, \psi$ also gets a vev, exactly aligned with the monopole vev, such that the triplet parametrizes the $\mathbb{CP}^1$ base of the $S^3$ Hopf bundle, with the monopoles providing the $S^1$ fibers. We also recall why this scenario is compatible with the Vafa-Witten theorem. We obtain these results by analyzing the phase diagram as a function of the fermion triplet mass $\vec m$: we show that for all $\vec m \neq 0$ there is a Coulomb phase with only a weakly-coupled photon at low energies, arising from a monopole vev that is aligned with $\vec m$ via the Hopf map. We then argue that taking $\vec m \to 0$ leads to the symmetry-breaking scenario above. Throughout, we give a detailed account of anomaly matching, which leads to a $\theta=\pi$ term in the $S^3$ sigma model. In one presentation, it can be understood as a Hopf term in a suitably gauged version of the $\mathbb{CP}^1$ sigma model.</span></description>
<link>https://inspirehep.net/literature/2838434</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2838434</guid>
<pubDate>Thu, 10 Oct 2024 04:43:35 GMT</pubDate>
<author>Thomas T. Dumitrescu, Pierluigi Niro, Ryan Thorngren</author>
</item>
<item>
<title>Manipulating topology of quantum phase transitions by symmetry enhancement</title>
<description><span>Topology plays a cardinal role in explaining phases and quantum phase transitions beyond the Landau-Ginzburg-Wilson paradigm. In this study, we formulate a set of models of Dirac fermions in 2+1 dimensions with SU($N$)$\times$SU(2)$\times$U(1) symmetry that have the potential to host critical points described by field theories with topological terms. For $N=2$ it shows a rich phase diagram containing semimetallic, quantum spin Hall insulating, Kekulé valence bond solid and s-wave superconducting phases and features multiple Landau-Ginzburg-Wilson phase transitions driven by interaction strength. At $N=1$ a deconfined quantum critical point is observed. At $N=2$ one expects the critical theory to correspond to a level 2 Wess-Zumino-Witten theory in 2+1 dimensions. Here the numerical results however show a strong first order transition. Another transition can be governed by a topological $\theta$-term which is rendered irrelevant for even values of $N$ thus leading to Landau-Ginzburg-Wilson behaviour.</span></description>
<link>https://inspirehep.net/literature/2837720</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2837720</guid>
<pubDate>Tue, 08 Oct 2024 08:09:37 GMT</pubDate>
<author>Gabriel Rein, Marcin Raczkowski, Zhenjiu Wang, Toshihiro Sato, Fakher F. Assaad</author>
</item>
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<item>
<title>Adding the algebraic Ryu-Takayanigi formula to the algebraic reconstruction theorem</title>
<description><span>A huge progress in studying holographic theories is that holography can be interpreted via the quantum error correction, which makes equal the entanglement wedge reconstruction, the Jafferis-Lewkowycz-Maldacena-Suh formula, the radial commutativity and the Ryu-Takayanagi formula. We call the equivalence the reconstruction theorem, whose infinite-dimensional generalization via algebraic language was believed to exclude the algebraic version of the Ryu-Takayanagi formula. However, recent developments regarding gravitational algebras have shown that the inclusion of the algebraic Ryu-Takayanagi formula is plausible. In this letter, we prove that such inclusion holds for the cases of type I/II factors, which are expected to describe holographic theories.</span></description>
<link>https://inspirehep.net/literature/2847042</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2847042</guid>
<pubDate>Tue, 12 Nov 2024 04:17:16 GMT</pubDate>
<author>Mingshuai Xu (Southeast U., Nanjing), Haocheng Zhong (Southeast U., Nanjing)</author>
</item>
<item>
<title>Holographic Boundary Conformal Field Theory within Horndeski Gravity</title>
<description><span>We investigate entanglement islands and the Page curve in the framework of Horndeski gravity on a Karch-Randall braneworld background. In particular, treating the holographic boundary conformal field theory analytically we find that the Horndeski parameters significantly alter the behavior of the Page curve compared to standard general relativity, a feature caused by the nontrivial geometry induced by the Horndeski scalar field. Interestingly enough, the geometry far from the AdS limit plays a more significant role compared to previous studies. This suggests that Horndeski gravity introduces important modifications to the distribution of quantum information in the holographic model. Finally, we claim that holographic consistency can be used reversely to impose constraints on Horndeski gravity itself, providing a new tool for probing the validity of modified gravity theories.</span></description>
<link>https://inspirehep.net/literature/2842587</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842587</guid>
<pubDate>Fri, 25 Oct 2024 04:25:10 GMT</pubDate>
<author>Fabiano F. Santos (Rio de Janeiro Federal U., Paraiba U.), Behnam Pourhassan (Damghan U., Khazar U., Baku, Istanbul, Tech. U., Kalu Jhanda, Chitkara U.), Emmanuel N. Saridakis (Natl. Tech. U., Athens, Hefei, CUST, Catolica del Norte U.), Oleksii Sokoliuk (Kyiv Astron. Observ.), Alexander Baransky, Emre Onur Kahya (Istanbul, Tech. U.)</author>
</item>
<item>
<title>Proceedings of the 3rd International Conference on Holography and its Applications (ICHA3 2024)</title>
<description></description>
<link>https://inspirehep.net/literature/2840490</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2840490</guid>
<pubDate>Wed, 16 Oct 2024 12:43:07 GMT</pubDate>
<author>Hoda Farahani, Juan Maldacena (Princeton, Inst. Advanced Study), Shahin Sheikh-Jabbari (IPM, Tehran), Lawrence M. Krauss (OPF, Phoenix), Sudhaker Upadhyay (Delhi U.), Shahin Mamedov, Li-Gang Wang (Zhejiang U.), Jingxuan Zhang (Zhejiang U.), Sait Eren San (Kocaeli U.), Syed Masood (Zhejiang U.), Salman Sajad Wani (Khalifa U.), Fabiano Francisco dos Santos (UFMA, Bacanga, CEFET, Maranhao), Srivastava Vivek Kumar (Dibrugarh U.), Sareh Eslamzadeh (Yasouj U.), Saheb Soroushfar (Yasouj U.), Mehrdad Malekiverki (Porto U.), Muhammad Piri (Lorestan U.)</author>
</item>
<item>
<title>Perturbative bootstrap of the Wilson-line defect CFT: Bulk-defect-defect correlators</title>
<description><span>We study the correlators of bulk and defect half-BPS operators in $\mathcal{N}=4$ super Yang-Mills theory with a Maldacena-Wilson line defect, focusing on the case involving one bulk and two defect local operators. We analyze the non-perturbative constraints on these correlators, which include a topological sector, pinching and splitting limits, as well as a compatibility with expanding in superconformal blocks. Using these constraints, we compute a variety of bulk-defect-defect correlators up to next-to-leading order at weak coupling, and observe that transcendental terms cancel. Additionally, we study the two leading terms in the strong-coupling regime, and present partial results for the next-to-next-to-leading order.</span></description>
<link>https://inspirehep.net/literature/2839381</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839381</guid>
<pubDate>Mon, 14 Oct 2024 04:09:27 GMT</pubDate>
<author>Daniele Artico (Humboldt U., Berlin), Julien Barrat (DESY), Yingxuan Xu (Humboldt U., Berlin)</author>
</item>
<item>
<title>Field theoretic and gravitational aspects of Warped Conformal Field Theories</title>
<description><span>framework that reconciles General Relativity and Quantum Field Theory. A
promising approach is the holographic principle, which posits a duality between a
d-dimensional gravity theory and a (d - 1)-dimensional quantum field theory living
on the boundary of the d-dimensional spacetime. Building on black hole thermodynamics
and the seminal AdS/CFT correspondence proposed by Maldacena, various
holographic dualities have been explored. This thesis focuses on a specific holographic
correspondence: Warped Anti-de Sitter in three dimensions (WAdS3) and
Warped Conformal Field Theory in two dimensions (WCFT2).
WAdS3 spacetimes emerge in diverse contexts such as extremal black holes, string
theory, and cold atoms. These spacetimes are solutions to extended theories of
gravity, like topologically massive gravity, rather than to standard Einstein gravity.
The dual field theories, WCFTs, are characterized by symmetries that form a
Virasoro-Kac-Moody algebra, distinct from the symmetries of traditional conformal
field theories.
In this thesis, we begin by exploring quantum energy conditions for WCFTs and
the various holographic descriptions of entanglement entropy in these theories. Next,
we determine the Hamiltonian reduction of Lower Spin Gravity and its connection to
the geometric action on the coadjoint orbits of the Warped Virasoro group. Finally,
we investigate the relationship between the quasinormal modes of warped black holes
and their associated photon rings.</span></description>
<link>https://inspirehep.net/literature/2837907</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2837907</guid>
<pubDate>Tue, 08 Oct 2024 20:55:36 GMT</pubDate>
<author>Quentin Vandermiers (Brussels U.)</author>
<category>holography</category>
<category>gravitation in 3d</category>
<category>WCFT</category>
<category>asymptotic symmetries</category>
<category>WAdS</category>
<category>photon ring</category>
<category>quasinormal modes</category>
<category>quantum energy condition</category>
<category>lower spin gravity</category>
</item>
<item>
<title>BTZ and thermal AdS torus partition functions</title>
<description><span>We rewrite the worldsheet torus partition function of the Thermal AdS CFT by isolating the boundary parameters. Using this, we show that the spectrum of the Euclidean BTZ black hole and Lorentzian <math altimg="si1.svg"><mi>A</mi><mi>d</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub></math> can be extracted – the latter as a zero temperature limit. A similar procedure recovers the Lorentzian BTZ spectrum proposed in an earlier work. We then use our expression to construct a boundary modular invariant expression as a Poincaré series. •Comparing boundaries. We point out that the comparison of boundary geometries of thermal <math altimg="si1.svg"><mi>A</mi><mi>d</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub></math> (TAdS) and Euclidean BTZ (EBTZ) is rather subtle. The boundary tori are characterised not only by their modular parameter T but also a Kähler modulus ρ constituted by the volume and B-field.•Euclidean spectra. Accounting for the subtlety, we show that the partition function calculated by Maldacena, Ooguri and Son [5] can be expanded to reveal either the TAdS spectrum (58) or the EBTZ spectrum (66). An important way in which the latter interpretation differs from the former is that it diagonalises the hyperbolic current algebra generator.•B-field. In both interpretations, we observe that correct momentum quantisation fixes an additive constant in the B-field, thereby disallowing large gauge transformations. We find that the EBTZ B-field differs from that expected [13] for Lorentzian BTZ. This, together with observations from our previous work [8], indicates that black hole microstates (as opposed to its equilibrium density matrix) are better studied directly in the Lorentzian signature.•Lorentzian spectra. The Lorentzian <math altimg="si1.svg"><mi>A</mi><mi>d</mi><msub><mrow><mi>S</mi></mrow><mrow><mn>3</mn></mrow></msub></math> spectrum was originally obtained [5] by interpreting the TAdS partition function as the free energy of a gas of strings. We show that the same is obtained simply as a low temperature limit followed by a Wick rotation.•Boundary modular invariance. We rewrite the Euclidean partition function in a manner that separates out its dependence on boundary parameters T and ρ (see (74) and (75)). This allows us to formulate a boundary modular invariant (100), akin to a Farey tail expansion [17].</span></description>
<link>https://inspirehep.net/literature/2834320</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2834320</guid>
<pubDate>Sat, 28 Sep 2024 16:02:18 GMT</pubDate>
<author>Roshan Kaundinya (ETH, Zurich (main)), Omkar Vinayak Nippanikar (Tata Inst.), Akash Singh (IISER, Mohali), K.P. Yogendran (IISER, Mohali)</author>
<category>BTZ</category>
<category>Partition function</category>
<category>AdS/CFT</category>
<category>Black hole</category>
<category>Spectrum</category>
<category>Modular invariance</category>
<category>Wick rotation</category>
</item>
<item>
<title>Restoring Causality in Higher Curvature Gravity</title>
<description><span>Incorporating higher curvature terms into gravity theories modifies the classical field equations, potentially leading to theoretical issues like Shapiro time advancements that violate the Camanho, Edelstein, Maldacena, and Zhiboedov (CEMZ) causality criterion. We explore this criterion within the context of Generalised Quadratic Gravity (GQG), a higher curvature theory with a distinct graviton three-point coupling from General Relativity (GR). By constructing an exact shock wave solution of GQG and calculating the Shapiro time shift for a massless probe graviton, we demonstrate that it can remain strictly positive within a classically allowed parameter space of couplings, ensuring the theory's adherence to the CEMZ criterion. This finding indicates that GQG can offer a causal extension beyond GR, paving the way for further exploration into the consistency of classical higher curvature gravity theories.</span></description>
<link>https://inspirehep.net/literature/2833110</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2833110</guid>
<pubDate>Thu, 26 Sep 2024 04:35:28 GMT</pubDate>
<author>Jose D. Edelstein (Santiago de Compostela U., IGFAE), Rajes Ghosh (Tata Inst.), Alok Laddha (Chennai Math. Inst.), Sudipta Sarkar (Indian Inst. Tech., Gandhinagar)</author>
<category>curvature, high</category>
<category>field equations, classical</category>
<category>gravitation</category>
<category>causality</category>
<category>graviton</category>
<category>general relativity</category>
<category>shock waves</category>
</item>
<item>
<title>The no boundary density matrix</title>
<description><span>We discuss a no-boundary proposal for a subregion of the universe. In the classical approximation, this density matrix involves finding a specific classical solution of the equations of motion with no boundary. Beyond the usual no boundary condition at early times, we also have another no boundary condition in the region we trace out. We can find the prescription by starting from the usual Hartle-Hawking proposal for the wavefunction on a full slice and tracing out the unobserved region in the classical approximation. We discuss some specific subregions and compute the corresponding solutions. These geometries lead to phenomenologically unacceptable probabilities, as expected. We also discuss how the usual Coleman de Luccia bubble solutions can be interpreted as a possible no boundary contribution to the density matrix of the universe. These geometries lead to local (but not global) maxima of the probability that are phenomenologically acceptable.</span></description>
<link>https://inspirehep.net/literature/2831923</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2831923</guid>
<pubDate>Tue, 24 Sep 2024 04:26:48 GMT</pubDate>
<author>Victor Ivo (Princeton U.), Yue-Zhou Li (Princeton U.), Juan Maldacena (Princeton, Inst. Advanced Study)</author>
</item>
<item>
<title>Four-point correlators in $ \mathcal{N} $ = 4 SYM from AdS$_{5}$ bubbling geometries Four-point correlators in N=4 SYM from AdS$_5$ bubbling geometrie...</title>
<description><span>Four-point correlation functions are observables of significant interest in holographic field theories. We compute an infinite family of four-point correlation functions of operators in short multiplets of 4D $ \mathcal{N} $ = 4 super Yang-Mills theory in the supergravity regime, by studying the quadratic fluctuations around non-trivial supergravity backgrounds. The supergravity backgrounds are supersymmetric smooth geometries in the family derived by Lin, Lunin and Maldacena. The light probes comprise an infinite sequence of Kaluza-Klein harmonics of the dilaton/axion. For generic parameter values, the supergravity backgrounds are dual to heavy CFT states. However we focus on the limit in which the dual CFT states become light single-particle states. The resulting all-light four-point correlators are related by superconformal Ward identities to previously known four-point correlators of half-BPS chiral primary operators. By verifying that the Ward identities are satisfied, we confirm the validity of the supergravity method.</span><br><span>Four-point correlation functions are observables of significant interest in holographic field theories. We compute an infinite family of four-point correlation functions of operators in short multiplets of 4D N=4 super Yang-Mills theory in the supergravity regime, by studying the quadratic fluctuations around non-trivial supergravity backgrounds. The supergravity backgrounds are supersymmetric smooth geometries in the family derived by Lin, Lunin and Maldacena. The light probes comprise an infinite sequence of Kaluza-Klein harmonics of the dilaton/axion. For generic parameter values, the supergravity backgrounds are dual to heavy CFT states. However we focus on the limit in which the dual CFT states become light single-particle states. The resulting all-light four-point correlators are related by superconformal Ward identities to previously known four-point correlators of half-BPS chiral primary operators. By verifying that the Ward identities are satisfied, we confirm the validity of the supergravity method.</span></description>
<link>https://inspirehep.net/literature/2823304</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2823304</guid>
<pubDate>Mon, 02 Sep 2024 04:14:56 GMT</pubDate>
<author>David Turton (Southampton U.), Alexander Tyukov (Southampton U.)</author>
<category>AdS-CFT Correspondence</category>
<category>Black Holes in String Theory</category>
</item>
<item>
<title>Three-point Functions in Aharony--Bergman--Jafferis--Maldacena Theory and Integrable Boundary States</title>
<description><span>We investigate the correlators of three single-trace operators in Aharony-Bergman-Jafferis-Maldacena (ABJM) theory from the perspective of integrable boundary states. Specifically, we focus on scenarios where two operators being $1/3$-BPS and the entire correlation function is considered within the twisted-translated frame. The correlator can be expressed as the overlap between a boundary state and a Bethe state. It is found that the boundary state formed by the two $1/3$-BPS operators is integrable only when the number of Wick contractions between the non-BPS operator and one of the $1/3$-BPS operators is 0 or 1. We compute the overlaps for the integrable cases utilizing the symmetries preserved by the correlators.</span></description>
<link>https://inspirehep.net/literature/2816007</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2816007</guid>
<pubDate>Thu, 08 Aug 2024 04:24:58 GMT</pubDate>
<author>Jun-Bao Wu (Tianjin U.), Peihe Yang (Peking U., CHEP)</author>
</item>
<item>
<title>BPS Chaos</title>
<description><span>Black holes are chaotic quantum systems that are expected to exhibit random matrix statistics in their finite energy spectrum. Lin, Maldacena, Rozenberg and Shan (LMRS) have proposed a related characterization of chaos for the ground states of BPS black holes with finite area horizons. On a separate front, the "fuzzball program" has uncovered large families of horizon-free geometries that account for the entropy of holographic BPS systems, but only in situations with sufficient supersymmetry to exclude finite area horizons. The highly structured, non-random nature of these solutions seems in tension with strong chaos. We verify this intuition by performing analytic and numerical calculations of the LMRS diagnostic in the corresponding boundary quantum system. In particular we examine the 1/2 and 1/4-BPS sectors of $\mathcal{N}=4$ SYM, and the two charge sector of the D1-D5 CFT. We find evidence that these systems are only weakly chaotic, with a Thouless time determining the onset of chaos that grows as a power of $N$. In contrast, finite horizon area BPS black holes should be strongly chaotic, with a Thouless time of order one. In this case, finite energy chaotic states become BPS as $N$ is decreased through the recently discovered "fortuity" mechanism. Hence they can plausibly retain their strongly chaotic character.</span></description>
<link>https://inspirehep.net/literature/2811714</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2811714</guid>
<pubDate>Tue, 30 Jul 2024 04:27:39 GMT</pubDate>
<author>Yiming Chen (Stanford U., ITP), Henry W. Lin (Stanford U., ITP), Stephen H. Shenker (Stanford U., ITP)</author>
</item>
<item>
<title>Thermal quenching of classical and semiclassical scrambling</title>
<description><span>Quantum scrambling often gives rise to short-time exponential growth in out-of-time-ordered correlators. The scrambling rate over an isolated saddle point at finite temperature is shown here to be reduced by a hierarchy of quenching processes. Two of these appear in the classical limit, where escape from the neighborhood of the saddle reduces the rate by a factor of two, and thermal fluctuations around the saddle reduce it further; a third process can be explained semiclassically as arising from quantum thermal fluctuations around the saddle, which are also responsible for imposing the Maldacena-Shenker-Stanford bound.</span></description>
<link>https://inspirehep.net/literature/2811439</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2811439</guid>
<pubDate>Mon, 29 Jul 2024 13:10:33 GMT</pubDate>
<author>Vijay Ganesh Sadhasivam, Andrew C. Hunt, Lars Meuser, Yair Litman, Stuart C. Althorpe</author>
</item>
<item>
<title>Operator algebra, quantum entanglement, and emergent geometry from matrix degrees of freedom</title>
<description><span>For matrix model and QFT, we discuss how dual gravitational geometry emerges from matrix degrees of freedom (specifically, adjoint scalars in super Yang-Mills theory) and how operator algebra that describes an arbitrary region of the bulk geometry can be constructed. We pay attention to the subtle difference between the notions of wave packets that describe low-energy excitations: QFT wave packet associated with the spatial dimensions of QFT, matrix wave packet associated with the emergent dimensions from matrix degrees of freedom, and bulk wave packet which is a combination of QFT and matrix wave packets. In QFT, there is an intriguing interplay between QFT wave packet and matrix wave packet that connects quantum entanglement and emergent geometry. We propose that the bulk wave packet is the physical object in QFT that describes the emergent geometry from entanglement. This proposal sets a unified view on two seemingly different mechanisms of holographic emergent geometry: one based on matrix eigenvalues and the other based on quantum entanglement. Further intuition comes from the similarity to a traversable wormhole discussed as the dual description of the coupled SYK model by Maldacena and Qi: the bulk can be seen as an eternal traversable wormhole connecting boundary regions.</span></description>
<link>https://inspirehep.net/literature/2800581</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2800581</guid>
<pubDate>Fri, 21 Jun 2024 04:18:05 GMT</pubDate>
<author>Vaibhav Gautam (Queen Mary, U. of London, Math. Sci., Surrey U.), Masanori Hanada (Queen Mary, U. of London, Math. Sci.), Antal Jevicki (Brown U.)</author>
</item>
<item>
<title>Black hole singularity and timelike entanglement Black Hole Singularity and Timelike Entanglement</title>
<description><span>We study timelike and conventional entanglement entropy as potential probes of black hole singularities via the AdS/CFT correspondence. Using an analytically tractable example, we find characteristic behavior of holographic timelike entanglement entropy when the geometry involves a curvature singularity. We also observe interesting phenomena that, in some particular setups, holographic timelike and conventional entanglement entropy are determined from multiple complex saddle points, which fall outside the assumptions of the Lewkowycz-Maldacena type argument.</span><br><span>We study timelike and conventional entanglement entropy as potential probes of black hole singularities via the AdS/CFT correspondence. Using an analytically tractable example, we find characteristic behavior of holographic timelike entanglement entropy when the geometry involves a curvature singularity. We also observe interesting phenomena that, in some particular setups, holographic timelike and conventional entanglement entropy are determined from multiple complex saddle points, which fall outside the assumptions of the Lewkowycz-Maldacena type argument.</span></description>
<link>https://inspirehep.net/literature/2799273</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2799273</guid>
<pubDate>Tue, 18 Jun 2024 03:52:44 GMT</pubDate>
<author>Takanori Anegawa (Yonago Natl. Coll. Tech., Osaka U., Inst. Phys.), Kotaro Tamaoka (Nihon U., Tokyo)</author>
<category>AdS-CFT Correspondence</category>
<category>Black Holes</category>
</item>
<item>
<title>The Aharony-Bergman-Jafferis-Maldacena theory on a circle</title>
<description><span>In this letter, we bootstrap the 4-point correlators on the 1D celestial circle using 3D symmetries in the Aharony-Bergman-Jafferis-Maldacena theory as constraints. We find that the dual inversion property is strong enough to replace the crossing symmetry condition (or cyclic invariant condition) when bootstrapping. We also give some results about the conformal block expansion coefficients which contain the spectrum and the leading multi-OPE of this celestial CFT. Furthermore, we find a non-local 2-particle operator from the multi-OPE at the leading OPE. Although we studied a specific theory, the methods used are valid for general cases. Finally, we try to find how the relations between the Grassmannians of $\mathcal{N}=4$ super Yang-Mills theory and the Aharony-Bergman-Jafferis-Maldacena theory with reduced supersymmetry are realized on the celestial sphere in the four-point case.</span></description>
<link>https://inspirehep.net/literature/2794820</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2794820</guid>
<pubDate>Thu, 06 Jun 2024 03:53:15 GMT</pubDate>
<author>Yi-Xiao Tao (Tsinghua U., Beijing)</author>
<category>symmetry: crossing</category>
<category>field theory: conformal</category>
<category>circle</category>
<category>conformal block</category>
<category>operator product expansion</category>
<category>duality</category>
<category>correlation function</category>
<category>nonlocal</category>
</item>
<item>
<title>Magnetic braneworlds: cosmology and wormholes Magnetic Braneworlds: Cosmology and Wormholes</title>
<description><span>We construct 4D flat Big Bang-Big Crunch cosmologies and Anti-de Sitter (AdS) planar eternally traversable wormholes using braneworlds embedded in asymptotically AdS$_{5}$ spacetimes. The background geometries are the AdS$_{5}$ magnetic black brane and the magnetically charged AdS$_{5}$ soliton, respectively. The two setups arise from different analytic continuations of the same saddle of the gravitational Euclidean path integral, in which the braneworld takes the form of a Maldacena-Maoz Euclidean wormhole. We show the existence of a holographic dual description of this setup in terms of a microscopic Euclidean boundary conformal field theory (BCFT) on a strip. By analyzing the BCFT Euclidean path integral, we show that the braneworld cosmology is encoded in a pure excited state of a CFT dual to a black brane microstate, whereas the braneworld wormhole is encoded in the ground state of the BCFT. The latter confines in the IR, and we study its confining properties using holography. We also comment on the properties of bulk reconstruction in the two Lorentzian pictures and their relationship via double analytic continuation. This work can be interpreted as an explicit, doubly-holographic realization of the relationship between cosmology, traversable wormholes, and confinement in holography, first proposed in arXiv:2102.05057, arXiv:2203.11220.</span><br><span>We construct 4D flat Big Bang-Big Crunch cosmologies and Anti-de Sitter (AdS) planar eternally traversable wormholes using braneworlds embedded in asymptotically AdS${}_5$ spacetimes. The background geometries are the AdS${}_5$ magnetic black brane and the magnetically charged AdS${}_5$ soliton, respectively. The two setups arise from different analytic continuations of the same saddle of the gravitational Euclidean path integral, in which the braneworld takes the form of a Maldacena-Maoz Euclidean wormhole. We show the existence of a holographic dual description of this setup in terms of a microscopic Euclidean boundary conformal field theory (BCFT) on a strip. By analyzing the BCFT Euclidean path integral, we show that the braneworld cosmology is encoded in a pure excited state of a CFT dual to a black brane microstate, whereas the braneworld wormhole is encoded in the ground state of the BCFT. The latter confines in the IR, and we study its confining properties using holography. We also comment on the properties of bulk reconstruction in the two Lorentzian pictures and their relationship via double analytic continuation. This work can be interpreted as an explicit, doubly-holographic realization of the relationship between cosmology, traversable wormholes, and confinement in holography, first proposed in arXiv:2102.05057, arXiv:2203.11220.</span></description>
<link>https://inspirehep.net/literature/2791250</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2791250</guid>
<pubDate>Thu, 30 May 2024 03:50:32 GMT</pubDate>
<author>Stefano Antonini (UC, Berkeley), Luis Gabriel C. Bariuan (UC, Berkeley)</author>
<category>AdS-CFT Correspondence</category>
<category>Black Holes in String Theory</category>
<category>Confinement</category>
<category>Cosmological models</category>
<category>field theory: conformal</category>
<category>wormhole: traversable</category>
<category>path integral: Euclidean</category>
<category>charge: magnetic</category>
<category>membrane model: magnetic</category>
<category>gravitation: Euclidean</category>
<category>background: geometry</category>
<category>wormhole: Euclidean</category>
<category>duality: holography</category>
<category>anti-de Sitter</category>
<category>cosmological model</category>
<category>black brane</category>
<category>confinement</category>
<category>soliton</category>
<category>space-time</category>
<category>excited state</category>
<category>ground state</category>
<category>microstate</category>
</item>
<item>
<title>Local Supersymmetry Enhancement and Black Hole Microstates</title>
<description><span>In string theory, black holes can be made from brane systems that are partially delocalized in string theory's extra dimensions. It is expected that they correspond to an ensemble of pure, horizonless microstates sourced by localized versions of this brane system. This thesis aims at studying the relationship between supersymmetric black holes and their microstates. In particular, we apply a concept called local supersymmetry enhancement to 1/4-BPS and 1/8-BPS systems that correspond to two-, three-, and four-charge black holes. This concept locally increases the number of preserved supercharges to 16 by adding dipole charges to the system. These bound states are then expected to be horizonless and describe the microstates of the black hole. First, we list all dipole charges for 1/4-BPS systems in Type II string theory. Then, we apply these to generate two structures to enhance 1/8-BPS systems, one with exclusively internal dipole charges and the other with a non-trivial shape in the non-compact dimensions. Thus, we identify the dipole charges for the microstates of various supersymmetric black holes, including new internal dipole charges for the D1-D5-P black hole and external ones for the D2-D2-D2-D6 black hole. These dipole charges reveal the local structure of the black hole's microstates and will be used in the construction of the corresponding supergravity solutions.</span></description>
<link>https://inspirehep.net/literature/2788810</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2788810</guid>
<pubDate>Wed, 22 May 2024 03:52:04 GMT</pubDate>
<author>Ben Eckardt (Munich U.)</author>
<category>charge: dipole</category>
<category>supersymmetry: local</category>
<category>string model: Type II</category>
<category>supergravity: solution</category>
<category>black hole: charge</category>
<category>microstate</category>
<category>membrane model</category>
<category>enhancement</category>
<category>structure</category>
<category>supercharge</category>
<category>noncompact</category>
<category>higher-dimensional</category>
<category>bound state</category>
<category>delocalization</category>
<category>localization</category>
<category>horizon</category>
<category>D-brane</category>
</item>
<item>
<title>Near-horizon chaos beyond Einstein gravity</title>
<description><span>We investigate chaos in the dynamics of outgoing massless particles near the horizon of static spherically symmetric (SSS) black holes in two well-motivated models of $f(R)$ gravity. In both these models, we probe chaos in the particle trajectories (under suitable harmonic confinement) in the vicinity of the black hole horizons, for a set of initial conditions. The particle trajectories, associated Poincar$\acute{e}$ sections, and Lyapunov exponents clearly illustrate the role played by the black hole horizon in the growth of chaos. We find that with increasing energy, the particle trajectories explore regions closer to the black hole horizon, with reduced overlap between two initially close trajectories. We demonstrate how this energy range is controlled by the parameters of the modified gravity theory under consideration. The growth of chaos in such a classical setting is known to respect a surface gravity bound arising from universal aspects of particle dynamics close to the black hole horizon [K. Hashimoto and N. Tanahashi, Phys. Rev. D 95, 024007 (2017)], analogous to the quantum MSS bound [J. Maldacena, S.H. Shenker and D. Stanford, JHEP 08 (2016) 106]. Interestingly, both models studied in our work respect the bound, in contrast to some of the other models of $f(R)$ gravity in the existing literature. The work serves as a motivation to use chaos as an additional tool to probe Einstein gravity in the strong gravity regime in the vicinity of black hole horizons.</span></description>
<link>https://inspirehep.net/literature/2787411</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2787411</guid>
<pubDate>Fri, 17 May 2024 03:44:06 GMT</pubDate>
<author>Surajit Das (Birla Inst. Tech. Sci.), Surojit Dalui (Shanghai U.), Rickmoy Samanta (Birla Inst. Tech. Sci.)</author>
<category>gravitation: model</category>
<category>black hole: horizon</category>
<category>symmetry: rotation</category>
<category>particle: massless</category>
<category>chaos</category>
<category>trajectory</category>
<category>boundary condition</category>
<category>confinement</category>
<category>Poincare</category>
<category>Einstein</category>
<category>space-time: static</category>
<category>gravitation: f(R)</category>
<category>Lyapunov exponent</category>
<category>parametric</category>
<category>gravitation: surface</category>
<category>universality</category>
<category>gravitation: strong field</category>
</item>
<item>
<title>Long-range wormhole teleportation</title>
<description><span>We extend the protocol of Gao and Jafferis arXiv:1911.07416 to allow wormhole teleportation between two entangled copies of the Sachdev-Ye-Kitaev (SYK) model communicating only through a classical channel. We demonstrate in finite $N$ simulations that the protocol exhibits the characteristic holographic features of wormhole teleportation discussed and summarized in Jafferis et al. https://www.nature.com/articles/s41586-022-05424-3 . We review and exhibit in detail how these holographic features relate to size winding which, as first shown by Brown et al. arXiv:1911.06314 and Nezami et al. arXiv:2102.01064, encodes a dual description of wormhole teleportation.</span></description>
<link>https://inspirehep.net/literature/2786407</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2786407</guid>
<pubDate>Tue, 14 May 2024 10:34:02 GMT</pubDate>
<author>Joseph D. Lykken (Fermilab), Daniel Jafferis (Harvard U. (main)), Alexander Zlokapa (MIT, Cambridge, CTP), David K. Kolchmeyer (MIT, Cambridge, CTP), Samantha I. Davis (Caltech, Fermilab), Hartmut Neven (Unlisted, US, CA), Maria Spiropulu (Caltech, Fermilab)</author>
<category>wormhole</category>
<category>teleportation</category>
<category>holography</category>
<category>duality</category>
<category>long-range</category>
<category>entanglement</category>
<category>Sachdev-Ye-Kitaev</category>
</item>
<item>
<title>Wormhole Restrictions from Quantum Energy Inequalities Wormhole restrictions from quantum energy inequalities</title>
<description><span>Wormhole solutions, bridges that connect different parts of spacetime, were proposed early in the history of General Relativity. Soon after, it was shown that all wormholes violate classical energy conditions, which are non-negativity constraints on contractions of the stress–energy tensor. Since these conditions are violated by quantum fields, it was believed that wormholes can be constructed in the context of semiclassical gravity. But negative energies in quantum field theory are not without restriction: quantum energy inequalities (QEIs) control renormalized negative energies averaged over a geodesic. Thus, QEIs provide restrictions on the construction of wormholes. This work is a review of the relevant literature, thus focusing on results where QEIs restrict traversable wormholes. Both ‘short’ and ‘long’ (without causality violations) wormhole solutions in the context of semiclassical gravity are examined. A new result is presented on constraints on the Maldacena, Milekhin, and Popov ‘long’ wormhole from the recently derived doubled smeared null energy condition.</span><br><span>Wormhole solutions, bridges that connect different parts of spacetime, were proposed early in the history of General Relativity. Soon after, it was shown that all wormholes violate classical energy conditions, which are non-negativity constraints on contractions of the stress-energy tensor. Since these conditions are violated by quantum fields, it was believed that wormholes can be constructed in the context of semiclassical gravity. But negative energies in quantum field theory are not without restriction: quantum energy inequalities (QEIs) control renormalized negative energies averaged over a geodesic. Thus, QEIs provide restrictions on the construction of wormholes. This work is a review of the relevant literature, thus focusing on results where QEIs restrict traversable wormholes. Both 'short' and 'long' (without causality violations) wormhole solutions in the context of semiclassical gravity are examined. A new result is presented on constraints on the Maldacena, Milekhin, and Popov 'long' wormhole from the recently derived doubled smeared null energy condition.</span></description>
<link>https://inspirehep.net/literature/2784749</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2784749</guid>
<pubDate>Fri, 10 May 2024 03:48:11 GMT</pubDate>
<author>Eleni-Alexandra Kontou (King's Coll. London, Dept. Math)</author>
<category>energy conditions</category>
<category>wormholes</category>
<category>semiclassical gravity</category>
<category>quantum energy inequalities</category>
<category>averaged null energy condition</category>
<category>energy: negative</category>
<category>gravitation: semiclassical</category>
<category>tensor: energy-momentum</category>
<category>causality: violation</category>
<category>wormhole: traversable</category>
<category>energy: classical</category>
<category>space-time</category>
<category>null-energy condition: violation</category>
<category>general relativity</category>
<category>geodesic</category>
<category>history</category>
<category>renormalization</category>
</item>
<item>
<title>Comparing the decoherence effects due to black holes versus ordinary matter</title>
<description><span>Recently a certain thought experiment was discussed which involves the decoherence of a quantum system due to a black hole. Here we show how this phenomenon is consistent with standard ideas about quantum black holes. In other words, modeling the black hole as a quantum system at finite temperature one obtains the same answer. We demonstrate this by analyzing the problem in terms of an effective theory that can apply both for the black hole case and for an ordinary matter system, showing that the same qualitative effect is present for ordinary matter at finite temperature.</span></description>
<link>https://inspirehep.net/literature/2783292</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2783292</guid>
<pubDate>Mon, 06 May 2024 03:42:24 GMT</pubDate>
<author>Anna Biggs (Princeton U.), Juan Maldacena (Princeton, Inst. Advanced Study)</author>
<category>effect: decoherence</category>
<category>black hole: quantum</category>
<category>finite temperature</category>
</item>
<item>
<title>Witten index of BMN matrix quantum mechanics</title>
<description><span>We compute the Witten index of the Berenstein-Maldacena-Nastase matrix quantum mechanics, which counts the number of ground states as well as the difference between the numbers of bosonic and fermionic BPS states with nonzero spins. The Witten index sets a lower bound on the entropy, which exhibits an $N^2$ growth that predicts the existence of BPS black holes in M-theory, asymptotic to the plane wave geometry. We also discuss a relation between the Witten index in the infinite $N$ limit and the superconformal index of the Aharony-Bergman-Jafferis-Maldacena theory.</span></description>
<link>https://inspirehep.net/literature/2781656</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2781656</guid>
<pubDate>Tue, 30 Apr 2024 03:52:13 GMT</pubDate>
<author>Chi-Ming Chang (Tsinghua U., Beijing, BIMSA, Beijing)</author>
<category>black hole: BPS</category>
<category>Witten index</category>
<category>quantum mechanics</category>
<category>M-theory</category>
<category>entropy</category>
<category>weak coupling</category>
<category>vacuum state</category>
<category>ABJM model</category>
<category>AdS(5)</category>
</item>
<item>
<title>Precision tests of bulk entanglement entropy Precision tests of bulk entanglement entropy</title>
<description><span>We consider linear superpositions of single particle excitations in a scalar field theory on AdS$_{3}$ and evaluate their contribution to the bulk entanglement entropy across the Ryu-Takayanagi surface. We compare the entanglement entropy of these excitations obtained using the Faulkner-Lewkowycz-Maldacena formula to the entanglement entropy of linear superposition of global descendants of a conformal primary in a large c CFT obtained using the replica trick. We show that the closed form expressions for the entanglement entropy in the small interval expansion both in gravity and the CFT precisely agree. The agreement serves as a non-trivial check of the FLM formula for the quantum corrections to holographic entanglement entropy as well as the methods developed in the CFT to evaluate entanglement entropy of descendants. Our checks includes an example in which the state is time dependent and spatially in-homogenous as well another example involving a coherent state with a Bañados geometry as its holographic dual.</span><br><span>We consider linear superpositions of single particle excitations in a scalar field theory on $AdS_3$ and evaluate their contribution to the bulk entanglement entropy across the Ryu-Takayanagi surface. We compare the entanglement entropy of these excitations obtained using the Faulkner-Lewkowycz-Maldacena formula to the entanglement entropy of linear superposition of global descendants of a conformal primary in a large $c$ CFT obtained using the replica trick. We show that the closed from expressions for the entanglement entropy in the small interval expansion both in gravity and the CFT precisely agree. The agreement serves as a non-trivial check of the FLM formula for the quantum corrections to holographic entropy which also involves a contribution from the back reacted minimal area. Our checks includes an example in which the state is time dependent and spatially in-homogenous as well another example involving a coherent state with a Bañados geometry as its holographic dual.</span></description>
<link>https://inspirehep.net/literature/2774106</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2774106</guid>
<pubDate>Fri, 05 Apr 2024 03:47:53 GMT</pubDate>
<author>Barsha G. Chowdhury (Bangalore, Indian Inst. Sci.), Justin R. David (Bangalore, Indian Inst. Sci.), Semanti Dutta (Bangalore, Indian Inst. Sci.), Jyotirmoy Mukherjee (TIFR, Mumbai, Dept. Theor. Phys.)</author>
<category>AdS-CFT Correspondence</category>
<category>Scale and Conformal Symmetries</category>
<category>entropy: entanglement</category>
<category>field theory: scalar</category>
<category>anti-de Sitter</category>
<category>field theory: conformal</category>
<category>correction: quantum</category>
<category>holography</category>
<category>coupling: minimal</category>
<category>BTZ</category>
<category>precision measurement</category>
</item>
<item>
<title>Comments on the no boundary wavefunction and slow roll inflation</title>
<description><span>We review aspects of the Hartle-Hawking no boundary geometry in the context of slow roll inflation. We give an analytic approximation to the geometry and we explain the rationale for the proposal. We also explain why it gives a prediction for the curvature of the universe that is in disagreement with observations and give a quick review of proposed ways to resolve that disagreement.</span></description>
<link>https://inspirehep.net/literature/2769194</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2769194</guid>
<pubDate>Mon, 18 Mar 2024 03:40:07 GMT</pubDate>
<author>Juan Maldacena (Princeton, Inst. Advanced Study)</author>
<category>inflation</category>
<category>slow-roll approximation</category>
<category>geometry</category>
<category>wave function</category>
<category>curvature</category>
<category>boundary condition</category>
</item>
<item>
<title>Giant Graviton Expansion from Bubbling Geometry: Discreteness from Quantized Geometry The Giant Graviton Expansion from Bubbling Geometry</title>
<description><span>The superconformal index of half-BPS states in <math display="inline"><mrow><mi mathvariant="script">N</mi><mo>=</mo><mn>4</mn></mrow></math> supersymmetric Yang-Mills with gauge group <math display="inline"><mrow><mi mathvariant="normal">U</mi><mo stretchy="false">(</mo><mi>N</mi><mo stretchy="false">)</mo></mrow></math> admits an expansion in terms of giant gravitons, <math display="inline"><mrow><msub><mrow><mi mathvariant="script">I</mi></mrow><mrow><mi>N</mi></mrow></msub><mo stretchy="false">(</mo><mi>q</mi><mo stretchy="false">)</mo><mo>=</mo><msub><mrow><mi mathvariant="script">I</mi></mrow><mrow><mi>∞</mi></mrow></msub><mo stretchy="false">(</mo><mi>q</mi><mo stretchy="false">)</mo><msubsup><mrow><mo>∑</mo></mrow><mrow><mi>m</mi><mo>=</mo><mn>0</mn></mrow><mrow><mi>∞</mi></mrow></msubsup><msup><mrow><mi>q</mi></mrow><mrow><mi>m</mi><mi>N</mi></mrow></msup><msub><mrow><mover accent="true"><mrow><mi mathvariant="script">I</mi></mrow><mrow><mo stretchy="false">^</mo></mrow></mover></mrow><mrow><mi>m</mi></mrow></msub><mo stretchy="false">(</mo><mi>q</mi><mo stretchy="false">)</mo></mrow></math>, where <math display="inline"><mi>m</mi></math> is the number of giant gravitons and <math display="inline"><msub><mi mathvariant="script">I</mi><mi>∞</mi></msub><mo stretchy="false">(</mo><mi>q</mi><mo stretchy="false">)</mo></math> is the graviton index. The expansion can be viewed as the implementation of trace relations for finite <math display="inline"><mi>N</mi></math>. We derive this expansion directly in supergravity from the class of half-BPS solutions due to Lin, Lunin, and Maldacena in type IIB supergravity. The moduli space of these configurations can be quantized using covariant quantization methods. We show how this quantization leads to the precise expression for the expansion in terms of giant gravitons. Our proposal provides a derivation of the giant graviton expansion directly in terms of quantized supergravity degrees of freedom, and it recovers discrete data via quantum geometries that are classically nonsmooth.</span><br><span>The superconformal index of half-BPS states in ${\cal N}=4$ supersymmetric Yang-Mills with gauge group $U(N)$ admits an expansion in terms of giant gravitons, ${\cal I}_N(q)={\cal I}_\infty(q) \sum\limits_{m=0}^\infty q^{mN}\hat{\mathcal I}_m(q)$, where $m$ is the number of giant gravitons. We derive this expansion directly in supergravity from the class of half-BPS solutions due to Lin, Lunin, and Maldacena in type IIB supergravity. The moduli space of these configurations can be quantized using covariant quantization methods. We review how this quantization leads to the graviton index, ${\cal I}_\infty(q)$, and present a modification that leads to the precise expression for the expansion in terms of giant gravitons. Our proposal provides a derivation of the giant graviton expansion directly in terms of supergravity degrees of freedom. We also comment on how to derive the expansion in terms of the effective Fermi droplet picture.</span></description>
<link>https://inspirehep.net/literature/2763337</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2763337</guid>
<pubDate>Sat, 02 Mar 2024 03:37:19 GMT</pubDate>
<author>Evan Deddo (Michigan U., LCTP), James T. Liu (Michigan U., LCTP), Leopoldo A. Pando Zayas (Michigan U., LCTP, ICTP, Trieste), Robert J. Saskowski (Michigan U., LCTP)</author>
<category>graviton: giant</category>
<category>Yang-Mills: supersymmetry</category>
<category>gravitation</category>
<category>supergravity</category>
<category>quantization</category>
<category>droplet</category>
<category>moduli space</category>
<category>geometry</category>
<category>U(N)</category>
<category>covariance</category>
<category>conformal</category>
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<title>Scaling law for membrane lifetime</title>
<description><span>Membrane configurations in the Banks-Fischler-Shenker-Susskind matrix model are unstable due to the existence of flat directions in the potential and the decay process can be seen as a realization of chaotic scattering. In this note, we compute the lifetime of a membrane in a reduced model. The resulting lifetime exhibits scaling laws with respect to energy, coupling constant and a cut-off scale. We numerically evaluate the scaling exponents, which cannot be fixed by the dimensional analysis. Finally, some applications of the results are discussed.</span></description>
<link>https://inspirehep.net/literature/2846306</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2846306</guid>
<pubDate>Fri, 08 Nov 2024 10:06:49 GMT</pubDate>
<author>Osamu Fukushima, Tomohiro Shigemura (Kyoto U.), Kentaroh Yoshida (Saitama U.)</author>
</item>
<item>
<title>A General Quantum Duality for Representations of Groups with Applications to Quantum Money, Lightning, and Fire</title>
<description><span>Aaronson, Atia, and Susskind established that swapping quantum states $|\psi\rangle$ and $|\phi\rangle$ is computationally equivalent to distinguishing their superpositions $|\psi\rangle\pm|\phi\rangle$. We extend this to a general duality principle: manipulating quantum states in one basis is equivalent to extracting values in a complementary basis. Formally, for any group, implementing a unitary representation is equivalent to Fourier subspace extraction from its irreducible representations. Building on this duality principle, we present the applications: * Quantum money, representing verifiable but unclonable quantum states, and its stronger variant, quantum lightning, have resisted secure plain-model constructions. While (public-key) quantum money has been constructed securely only from the strong assumption of quantum-secure iO, quantum lightning has lacked such a construction, with past attempts using broken assumptions. We present the first secure quantum lightning construction based on a plausible cryptographic assumption by extending Zhandry's construction from Abelian to non-Abelian group actions, eliminating reliance on a black-box model. Our construction is realizable with symmetric group actions, including those implicit in the McEliece cryptosystem. * We give an alternative quantum lightning construction from one-way homomorphisms, with security holding under certain conditions. This scheme shows equivalence among four security notions: quantum lightning security, worst-case and average-case cloning security, and security against preparing a canonical state. * Quantum fire describes states that are clonable but not telegraphable: they cannot be efficiently encoded classically. These states "spread" like fire, but are viable only in coherent quantum form. The only prior construction required a unitary oracle; we propose the first candidate in the plain model.</span></description>
<link>https://inspirehep.net/literature/2845114</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2845114</guid>
<pubDate>Mon, 04 Nov 2024 04:15:42 GMT</pubDate>
<author>John Bostanci (Munich, Max Planck Inst., Columbia U.), Barak Nehoran (Princeton U.), Mark Zhandry (Lockheed, Sunnyvale)</author>
</item>
<item>
<title>$T^2$ deformations in the double-scaled SYK model: Stretched horizon thermodynamics</title>
<description><span>It has been recently realized that the bulk dual of the double-scaled SYK (DSSYK) model has both positive and negative Ricci curvature and is described by a dilaton-gravity theory with a $\sin(\Phi)$ potential arXiv:2404.03535. We study T$^2$-deformations in the DSSYK model after performing the ensemble averaging to probe regions of positive and approximately constant curvature. The dual finite cutoff interpretation of the deformation allows us to place the DSSYK model in the stretched horizon of the bulk geometry, partially realizing a conjecture of Susskind arXix:2109.14104. We show that the energy spectrum and thermodynamic entropy are well-defined for a contour reaching these regions. Importantly, the system displays a phase transition from a thermodynamically stable to an unstable configuration by varying its microcanonical temperature; unless it is located on any of the stretched horizons, which is always unstable. The thermodynamic properties in this model display an enhanced growth as the system approaches the stretched horizon, and it scrambles information at a (hyper)-fast rate.</span></description>
<link>https://inspirehep.net/literature/2842521</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2842521</guid>
<pubDate>Fri, 25 Oct 2024 04:19:31 GMT</pubDate>
<author>Sergio E. Aguilar-Gutierrez (Okinawa Inst. Sci. Tech., Leuven U.)</author>
</item>
<item>
<title>Bootstrapping Ground State Correlators in Matrix Theory, Part I</title>
<description><span>The D0-brane/Banks-Fischler-Shenker-Susskind matrix theory is a strongly coupled quantum system with an interesting gravity dual. We develop a scheme to derive bootstrap bounds on simple correlators in the matrix theory at infinite $N$ at zero energy by imposing the supercharge equations of motion. By exploiting SO(9) symmetry, we are able to consider single-trace operators involving words of length up to 9 using very modest computational resources. We interpret our initial results as strong evidence that the bootstrap method can efficiently access physics in the strongly coupled, infinite $N$ regime.</span></description>
<link>https://inspirehep.net/literature/2841250</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2841250</guid>
<pubDate>Mon, 21 Oct 2024 04:11:08 GMT</pubDate>
<author>Henry W. Lin (Stanford U.), Zechuan Zheng (Perimeter Inst. Theor. Phys.)</author>
</item>
<item>
<title>Validity of black hole complementarity in an accelerating Schwarzschild black hole</title>
<description><span>Black hole complementarity has been well understood in spherically symmetric black holes. To study its validity for an accelerating Schwarzschild black hole, which has a preferred direction, we perform the thought experiment proposed by Susskind and Thorlacius and further investigate the criteria set by Hayden and Preskill. First, we derive thermodynamic quantities that satisfy the first law of thermodynamics. Using these quantities, we conduct thought experiments based on the Page time and the scrambling time, which show that black hole complementarity remains valid, although the energy required for the duplication of information depends on the angle due to the axisymmetric metric.</span></description>
<link>https://inspirehep.net/literature/2839363</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839363</guid>
<pubDate>Mon, 14 Oct 2024 04:08:11 GMT</pubDate>
<author>Wontae Kim (Sogang U., CQUeST, Seoul), Mungon Nam (Sogang U., CQUeST, Seoul)</author>
</item>
<item>
<title>Spacetime aspects of non-supersymmetric strings</title>
<description><span>The consistency of string theory as a theory of gravity does not rely on the presence of spacetime supersymmetry; however, its absence leads to the emergence of tadpole diagrams in the on-shell worldsheet formulation, thus undermining our control over the physics. Two-dimensional conformal invariance, a pillar of string theory, requires tadpole subtraction through the Fischler-Susskind mechanism, whose spacetime consequence is the emergence of scalar tadpole potentials. In this thesis, I explore several implications of the absence of supersymmetry in string-derived scenarios. I focus on the three ten-dimensional tachyon-free string theories in which spacetime supersymmetry is absent or broken, studying the gravitational consequences of tadpole potentials. First, I address vacuum solutions in terms of singular codimension-one vacua, explore their generalizations, and discuss the properties of their singular boundaries. I present an alternative perspective on these vacua based on the formalism of fake supersymmetry, in which the second-order equations of motion are replaced by supersymmetry-like first-order equations. I then turn to the topic of engineering vacua in the non-supersymmetric string models by constructing solutions that are supported by electric and magnetic fluxes and by providing evidence for their instability. Finally, I investigate brane-like solutions in the presence of tadpole potentials that yield both flux vacua with the isometries of supersymmetric branes and gravitational profiles that capture the backreaction of localized sources.</span></description>
<link>https://inspirehep.net/literature/2835322</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2835322</guid>
<pubDate>Tue, 01 Oct 2024 04:30:54 GMT</pubDate>
<author>Salvatore Raucci</author>
<category>dimension, 2</category>
<category>vacuum, solution</category>
<category>tadpole, scalar</category>
<category>invariance, conformal</category>
<category>vacuum state, flux</category>
<category>dimension, 10</category>
<category>supersymmetry</category>
<category>space-time</category>
<category>string model</category>
<category>gravitation</category>
<category>isometry</category>
<category>capture</category>
<category>string</category>
<category>engineering</category>
<category>field equations</category>
<category>back reaction</category>
<category>stability</category>
<category>membrane model</category>
</item>
<item>
<title>Gauge Loop-String-Hadron Formulation on General Graphs and Applications to Fully Gauge Fixed Hamiltonian Lattice Gauge Theory</title>
<description><span>We develop a gauge invariant, Loop-String-Hadron (LSH) based representation of SU(2) Yang-Mills theory defined on a general graph consisting of vertices and half-links. Inspired by weak coupling studies, we apply this technique to maximal tree gauge fixing. This allows us to develop a fully gauge fixed representation of the theory in terms of LSH quantum numbers. We explicitly show how the quantum numbers in this formulation directly relate to the variables in the magnetic description. In doing so, we will also explain in detail the way that the Kogut-Susskind formulation, prepotentials, and point splitting, work for general graphs. In the appendix of this work we provide a self-contained exposition of the mathematical details of Hamiltonian pure gauge theories defined on general graphs.</span></description>
<link>https://inspirehep.net/literature/2831846</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2831846</guid>
<pubDate>Tue, 24 Sep 2024 04:09:15 GMT</pubDate>
<author>I.M. Burbano (LBL, Berkeley, UC, Berkeley), Christian W. Bauer (LBL, Berkeley, UC, Berkeley)</author>
<category>Yang-Mills, SU(2)</category>
<category>gauge field theory, Yang-Mills</category>
<category>invariance, gauge</category>
<category>representation, SU(2)</category>
<category>Hamiltonian</category>
<category>quantum number</category>
<category>point splitting</category>
<category>weak coupling</category>
<category>prepotential</category>
<category>lattice field theory</category>
<category>gauge fixing</category>
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<item>
<title>Of asymptotic charges and renormalizations</title>
<description><span>Since the early 20th century, physicists have pursued a quantum theory of gravitation, with notable breakthroughs such as 1970 Bekenstein's proposal linking black hole entropy to the event horizon surface area. By leveraging upon this observation, 't Hooft and Susskind then introduced the holographic principle, proposing that quantum gravity degrees of freedom might be encoded in lower-dimensional surfaces. Maldacena's work extended this idea with the AdS/CFT correspondence, connecting gravitational theories on Anti de Sitter (AdS) spacetime to conformal field theories (CFT) defined on the boundary of AdS. However, this duality involves a negative cosmological constant, conflicting with its observed positive value. This PhD thesis aims to explore selected aspects of the AdS/CFT correspondence and their generalization in the limit of vanishing cosmological constant. In particular, this manuscript focuses on asymptotic symmetries and corner or, equivalently, surface charges through the Lagrangian approach to general relativity and covariant phase space. This framework offers insights into observables in gravity and dual gauge theories. Identifying physical asymptotic symmetries allows indeed one to identify the global symmetries of the dual conformal field theory and thus sets up crucial constraints allowing to identify the latter. In their turn, the relevant symmetries are selected by non-trivial surface charges. However, determining the surface charges faces challenges due to divergences as one approaches the asymptotic boundary. To tackle this, we confront variational and symplectic structure ``renormalization schemes'', opting for the latter for a systematic study. To illustrate these techniques, we analyze asymptotic symmetries of Maxwell theory in both Anti de Sitter and flat backgrounds, aiming to recover the flat space results from AdS. This leads to studying the relaxation of the standard Fefferman-Graham gauge within Einstein gravity, resulting in the Weyl-Fefferman-Graham gauge, which restores the broken boundary Weyl covariance and introduces new charges associated with the underlying Weyl geometry. This raises questions about new charges related to different available choices for the underlying symplectic structure. These issues are also linked with the current efforts in the literature to transition towards gauge-free analyses. As a general guideline, one could argue that the more physical charges the better, as this would lead to larger symmetry algebras that are more powerful to organize the observables of the theory. While the Fefferman-Graham gauge is suited to AdS/CFT, it falls short for asymptotically flat spaces. In contrast, the Bondi gauge, designed for flat spacetimes and gravitational waves, is universally applicable. Introducing a relaxation, the covariant Bondi gauge combines advantages of all aforementioned gauges, providing insights into boundary anomalies through a fluid/gravity representation and deepening the understanding of the holographic duality through new finite corner physical charges.</span></description>
<link>https://inspirehep.net/literature/2828171</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2828171</guid>
<pubDate>Fri, 13 Sep 2024 13:42:05 GMT</pubDate>
<author>Arnaud Delfante (U. Mons)</author>
</item>
<item>
<title>An efficient finite-resource formulation of non-Abelian lattice gauge theories beyond one dimension</title>
<description><span>Non-Abelian gauge theories provide an accurate description of fundamental interactions, as both perturbation theory and quantum Monte Carlo computations in lattice gauge theory, it when applicable, show remarkable agreement with experimental data from particle colliders and cosmological observations. Complementing these computations, or combining them with quantum-inspired Hamiltonian lattice computations on quantum machines to improve continuum limit predictions with current quantum resources, is a formidable open challenge. Here, we propose a resource-efficient method to compute the running of the coupling in non-Abelian gauge theories beyond one spatial dimension. We first represent the Hamiltonian on periodic lattices in terms of loop variables and conjugate loop electric fields, exploiting the Gauss law to retain the gauge-independent ones. Then, we identify a local basis for small and large loops variationally to minimize the truncation error while computing the running of the coupling on small tori. Our method enables computations at arbitrary values of the bare coupling and lattice spacing with current quantum computers, simulators and tensor-network calculations, in regimes otherwise inaccessible.</span></description>
<link>https://inspirehep.net/literature/2825804</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2825804</guid>
<pubDate>Mon, 09 Sep 2024 04:10:51 GMT</pubDate>
<author>Pierpaolo Fontana, Marc Miranda Riaza, Alessio Celi</author>
</item>
<item>
<title>Progress in Trapped-Ion Quantum Simulation</title>
<description><span>Trapped ions offer long coherence times and high fidelity, programmable quantum operations, making them a promising platform for quantum simulation of condensed matter systems, quantum dynamics, and problems related to high-energy physics. We review selected developments in trapped-ion qubits and architectures and discuss quantum simulation applications that utilize these emerging capabilities. This review emphasizes developments in digital (gate-based) quantum simulations that exploit trapped-ion hardware capabilities, such as flexible qubit connectivity, selective mid-circuit measurement, and classical feedback, to simulate models with long-range interactions, explore non-unitary dynamics, compress simulations of states with limited entanglement, and reduce the circuit depths required to prepare or simulate long-range entangled states.</span></description>
<link>https://inspirehep.net/literature/2825331</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2825331</guid>
<pubDate>Fri, 06 Sep 2024 05:18:31 GMT</pubDate>
<author>Michael Foss-Feig (Unlisted, US, CO), Guido Pagano (Rice U.), Andrew C. Potter (British Columbia U.), Norman Y. Yao (Harvard U.)</author>
</item>
<item>
<title>Abelian Anyons on Flux-Quantized M5-Branes</title>
<description><span>While fractional quantum Hall systems provide the best experimental evidence yet of (abelian) anyons plausibly necessary for future fault-tolerant quantum computation, like all strongly-coupled quantum systems their physics is not deeply understood. However, generally a promising approach is to (holographically) realize such systems on branes in string/M-theory; and specifically an old argument by Hellerman &amp; Susskind gives a sketch of fractional quantum Hall states arising via discrete light cone quantization of M5/M9-brane intersections. Here we present a rigorous derivation of abelian anyon quantum states on M5$\perp$MO9-branes ("open M5-branes") on the discrete light cone, after globally completing the traditional local field content on the M5-worldvolume via a flux-quantization law compatible with the ambient 11d supergravity, specifically taken to be in the unstable co-Homotopy cohomology ("Hypothesis H"). The main step in the proof uses a theorem of Okuyama to identify co-Homotopy moduli spaces with configuration spaces of strings with charged endpoints, and identifies their loop spaces with cobordism of framed links that, under topological light cone quantization, turn out to be identified with the regularized Wilson loops of abelian Chern-Simons theory.</span></description>
<link>https://inspirehep.net/literature/2820653</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2820653</guid>
<pubDate>Fri, 23 Aug 2024 04:13:22 GMT</pubDate>
<author>Hisham Sati (New York U., Abu Dhabi, New York U., Courant Inst.), Urs Schreiber (New York U., Abu Dhabi)</author>
</item>
<item>
<title>Concurrent VQE for Simulating Excited States of the Schwinger Model</title>
<description><span>This work explores the application of the concurrent variational quantum eigensolver (cVQE) for computing excited states of the Schwinger model. By designing suitable ansatz circuits utilizing universal SO(4) or SO(8) qubit gates, we demonstrate how to efficiently obtain the lowest two, four, and eight eigenstates with one, two, and three ancillary qubits for both vanishing and non-vanishing background electric field cases. Simulating the resulting quantum circuits classically with tensor network techniques, we demonstrate the capability of our approach to compute the two lowest eigenstates of systems with up to $\mathcal{O}(100)$ qubits. Given that our method allows for measuring the low-lying spectrum precisely, we also present a novel technique for estimating the additive mass renormalization of the lattice based on the energy gap. As a proof-of-principle calculation, we prepare the ground and first-excited states with one ancillary and four physical qubits on quantum hardware, demonstrating the practicality of using the cVQE to simulate excited states.</span></description>
<link>https://inspirehep.net/literature/2809910</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2809910</guid>
<pubDate>Tue, 23 Jul 2024 04:19:04 GMT</pubDate>
<author>Yibin Guo (DESY, Zeuthen), Takis Angelides (DESY, Zeuthen, Humboldt U., Berlin), Karl Jansen (DESY, Zeuthen, Cyprus Inst.), Stefan Kühn (DESY, Zeuthen)</author>
</item>
<item>
<title>$p$-Chords, Wee-Chords, and de Sitter Space</title>
<description><span>One of us (L.S.) and H. Verlinde independently conjectured a holographic duality between the double-scaled SYK model at infinite temperature and dimensionally reduced $(2+1)$-dimensional de Sitter space [1]-[8]. Beyond the statement that such a duality exists there was deep disagreement between the two proposals [9]. In this note, we trace the origin of the disagreement to a superficial similarity between two q-deformed algebraic structures: the algebra of "chords" in DSSYK, and the algebra of line operators in the Chern-Simons formulation of 3D de Sitter gravity. Assuming that these two structures are the same requires an identification of parameters [7][10] which leads to a collapse of the separation of scales [9] -- the separation being required by the semiclassical limit [3][9]. Dropping that assumption restores the separation of scales but leaves unexplained the relation between chords and Chern-Simons line operators. In this note we point out the existence of a third q-deformed algebra that appears in DSSYK: the algebra of ``wee-chords." Identifying the Chern-Simons line operators with wee-chords removes the discrepancy and leads to a satisfying relation between the two sides of the duality.</span></description>
<link>https://inspirehep.net/literature/2808943</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2808943</guid>
<pubDate>Fri, 19 Jul 2024 04:19:33 GMT</pubDate>
<author>Adel A. Rahman (Stanford U., ITP, Stanford U., Phys. Dept.), Leonard Susskind (Stanford U., ITP, Stanford U., Phys. Dept., Google Research, CH)</author>
</item>
<item>
<title>Incompressibility and spectral gaps of random circuits</title>
<description><span>Random reversible and quantum circuits form random walks on the alternating group $\mathrm{Alt}(2^n)$ and unitary group $\mathrm{SU}(2^n)$, respectively. Known bounds on the spectral gap for the $t$-th moment of these random walks have inverse-polynomial dependence in both $n$ and $t$. We prove that the gap for random reversible circuits is $\Omega(n^{-3})$ for all $t\geq 1$, and the gap for random quantum circuits is $\Omega(n^{-3})$ for $t \leq \Theta(2^{n/2})$. These gaps are independent of $t$ in the respective regimes. We can further improve both gaps to $n^{-1}/\mathrm{polylog}(n, t)$ for $t\leq 2^{\Theta(n)}$, which is tight up to polylog factors. Our spectral gap results have a number of consequences: 1) Random reversible circuits with $\mathcal{O}(n^4 t)$ gates form multiplicative-error $t$-wise independent (even) permutations for all $t\geq 1$; for $t \leq \Theta(2^{n/6.1})$, we show that $\tilde{\mathcal{O}}(n^2 t)$ gates suffice. 2) Random quantum circuits with $\mathcal{O}(n^4 t)$ gates form multiplicative-error unitary $t$-designs for $t \leq \Theta(2^{n/2})$; for $t\leq \Theta(2^{2n/5})$, we show that $\tilde{\mathcal{O}}(n^2t)$ gates suffice. 3) The robust quantum circuit complexity of random circuits grows linearly for an exponentially long time, proving the robust Brown--Susskind conjecture [BS18,BCHJ+21]. Our spectral gap bounds are proven by reducing random quantum circuits to a more structured walk: a modification of the ``$\mathrm{PFC}$ ensemble'' from [MPSY24] together with an expander on the alternating group due to Kassabov [Kas07a], for which we give an efficient implementation using reversible circuits. In our reduction, we approximate the structured walk with local random circuits without losing the gap, which uses tools from the study of frustration-free Hamiltonians.</span></description>
<link>https://inspirehep.net/literature/2797109</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2797109</guid>
<pubDate>Wed, 12 Jun 2024 04:06:40 GMT</pubDate>
<author>Chi-Fang Chen (Zurich, ETH), Jeongwan Haah (Zurich, ETH), Jonas Haferkamp (Zurich, ETH), Yunchao Liu (Zurich, ETH), Tony Metger (Zurich, ETH), Xinyu Tan (Zurich, ETH)</author>
</item>
<item>
<title>Quasi-fragmentation functions in the massive Schwinger model</title>
<description><span>We introduce the concept of the quark quasi-fragmentation function (qFF) using an equal-time and spatially boosted form of the Collins-Soper fragmentation function (FF) where the out-meson fragment is replaced by the current asymptotic condition. We derive the qFF for a fermion in two-dimensional quantum electrodynamics (QED2) using the Kogut-Susskind Hamiltonian after a mapping onto spin qubits in a spatial lattice with open boundary conditions. This form is suitable for quantum computations. We compute the qFF by exact diagonalization of the spin Hamiltonian. The results are compared to the qFF following from the Drell-Levy-Yan (DLY) result for QED2, both at strong and weak coupling, and to two-dimensional quantum chromodynamics (QCD2) in the lowest Fock approximation.</span></description>
<link>https://inspirehep.net/literature/2794365</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2794365</guid>
<pubDate>Wed, 05 Jun 2024 03:43:26 GMT</pubDate>
<author>Sebastian Grieninger (Stony Brook U.), Ismail Zahed (Stony Brook U.)</author>
<category>dimension: 2</category>
<category>qubit: spin</category>
<category>Schwinger model: massive</category>
<category>computer: quantum</category>
<category>Hamiltonian</category>
<category>quantum chromodynamics</category>
<category>quantum electrodynamics</category>
<category>weak coupling</category>
<category>strong coupling</category>
<category>quark: fragmentation function</category>
<category>boundary condition</category>
<category>lattice</category>
</item>
<item>
<title>Exponential improvements in the simulation of lattice gauge theories using near-optimal techniques</title>
<description><span>Simulation of quantum systems of a large number of strongly interacting particles persists as one of the most challenging, and computationally demanding, tasks in classical simulation, involving both non-relativistic applications like condensed matter physics and quantum chemistry, as well as relativistic applications like lattice gauge theory simulation. One of the major motivations for building a fault-tolerant quantum computer is the efficient simulation of many-body systems on such a device. While significant developments have been made in the quantum simulation of non-relativistic systems, the simulation of lattice gauge theories has lagged behind, with state-of-the-art Trotterized simulations requiring many orders of magnitude more resources than non-relativistic simulation, in stark contrast to the similar difficulty of these tasks in classical simulation. In this work, we conduct an in-depth analysis of the cost of simulating Abelian and non-Abelian lattice gauge theories in the Kogut-Susskind formulation using simulation methods with near-optimal scaling in system size, evolution time, and error. We provide explicit circuit constructions, as well as T-gate counts and qubit counts for the entire simulation algorithm. This investigation, the first of its kind, leads to up to 25 orders of magnitude improvement over Trotterization in spacetime volume for non-Abelian simulations. Such a dramatic improvement results largely from our algorithm having polynomial scaling with the number of colors, as opposed to exponential scaling in existing approaches. Our work demonstrates that the use of advanced algorithmic techniques leads to dramatic reductions in the cost of ab initio simulations of fundamental interactions, bringing it in step with resources required for first principles quantum simulation of chemistry and condensed matter physics.</span></description>
<link>https://inspirehep.net/literature/2787844</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2787844</guid>
<pubDate>Mon, 20 May 2024 03:35:14 GMT</pubDate>
<author>Mason Rhodes (Sandia, New Mexico U.), Michael Kreshchuk (LBL, Berkeley), Shivesh Pathak (Sandia, Livermore, LLNL, Livermore, Sandia)</author>
</item>
<item>
<title>Dumbell Fermions and Fermi-Pauli Duality</title>
<description><span>We use the Kantor-Susskind\cite{kantsuss} model of fermions as "dumbbells" connecting points on a cubic lattice to points on its dual, to define a duality between local fermionic models invariant under a $Z_2$ gauge symmetry and models of bosonic variables (generalizations of Pauli matrices) defined on the lattice.</span></description>
<link>https://inspirehep.net/literature/2779459</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2779459</guid>
<pubDate>Tue, 23 Apr 2024 03:48:32 GMT</pubDate>
<author>Tom Banks (Rutgers U., Piscataway)</author>
<category>fermion: model</category>
<category>symmetry: gauge</category>
<category>fermion: local</category>
<category>duality</category>
<category>lattice</category>
<category>Pauli</category>
</item>
<item>
<title>Quantum focusing conjecture in two-dimensional evaporating black holes Quantum focusing conjecture in two-dimensional evaporating black holes</title>
<description><span>We consider the quantum focusing conjecture (QFC) for two-dimensional evaporating black holes in the Russo-Susskind-Thorlacius (RST) model. The QFC is closely related to the behavior of the generalized entropy. In the context of the black hole evaporation, the entanglement entropy of the Hawking radiation is decreasing after the Page time, and therefore it is not obvious whether the QFC holds. One of the present authors previously addressed this problem in a four-dimensional spherically symmetric dynamical black hole model and showed that the QFC is satisfied. However, the background spacetime considered was approximated by the Vaidya metric, and quantum effects of matters in the semiclassical regime were not fully taken into consideration. It remains to be seen if the QFC in fact holds for exact solutions of the semiclassical Einstein equations. In this paper, we address this problem in the RST model, which allows us to solve the semiclassical equations of motion exactly. We prove that the QFC is satisfied for evaporating black holes in the RST model with the island formation taken into account.</span><br><span>We consider the quantum focusing conjecture (QFC) for two-dimensional evaporating black holes. The QFC is closely related to the behavior of the generalized entropy -- the sum of the area entropy for a given co-dimension two surface and the entanglement entropy for quantum fields outside the area. In the context of the black hole evaporation, the entanglement entropy of the Hawking radiation is decreasing after the Page time, and therefore it is not obvious whether the QFC holds in the black hole evaporation process especially after the Page time. One of the present authors previously addressed this problem in a four-dimensional spherically symmetric dynamical black hole model and showed that the QFC is satisfied. However the background spacetime considered was approximated by the Vaidya metric, and quantum effects of matters in the semiclassical regime is not fully taken into consideration. It remains to be seen if the QFC in fact holds for exact solutions of the semiclassical Einstein equations. In this paper, we address this problem in a two-dimensional dynamical black hole of the Russo-Susskind-Thorlacius (RST) model, which allows us to solve the semiclassical equations of motion exactly. We first give a suitable definition of the quantum expansion in two-dimensions and then prove that the QFC is satisfied for evaporating black holes in the RST model with the island formation taken into account.</span></description>
<link>https://inspirehep.net/literature/2772380</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2772380</guid>
<pubDate>Fri, 29 Mar 2024 03:47:15 GMT</pubDate>
<author>Akihiro Ishibashi (Kinki U., Osaka), Yoshinori Matsuo (Kinki U., Osaka), Akane Tanaka (Kinki U., Osaka)</author>
<category>2D Gravity</category>
<category>Black Holes</category>
<category>AdS-CFT Correspondence</category>
<category>dimension: 2</category>
<category>entropy: entanglement</category>
<category>black hole: evaporation</category>
<category>matter: effect</category>
<category>dimension: 4</category>
<category>entropy: Hawking</category>
<category>solution: semiclassical</category>
<category>black hole: model</category>
<category>Einstein equation: semiclassical</category>
<category>space-time: background</category>
<category>effect: quantum</category>
<category>radiation: Hawking</category>
<category>field equations: semiclassical</category>
<category>symmetry: rotation</category>
<category>Vaidya</category>
<category>formation</category>
<category>surface</category>
</item>
<item>
<title>Qu8its for quantum simulations of lattice quantum chromodynamics Qu8its for Quantum Simulations of Lattice Quantum Chromodynamics</title>
<description><span>We explore the utility of <math display="inline"><mi>d</mi><mo>=</mo><mn>8</mn></math> qudits, qu8its, for quantum simulations of the dynamics of <math display="inline"><mrow><mn>1</mn><mo>+</mo><mn>1</mn><mi mathvariant="normal">D</mi></mrow></math> SU(3) lattice quantum chromodynamics, including a mapping for arbitrary number of flavors and lattice size and a reorganization of the Hamiltonian for efficient time evolution. Recent advances in parallel gate applications, along with the shorter application times of single-qudit operations compared with two-qudit operations, lead to significant projected advantages in quantum simulation fidelities and circuit depths using qu8its rather than qubits. The number of two-qudit entangling gates required for time evolution using qu8its is found to be more than a factor of 5 fewer than for qubits. We anticipate that the developments presented in this work will enable improved quantum simulations to be performed using emerging quantum hardware.</span><br><span>We explore the utility of $d=8$ qudits, qu8its, for quantum simulations of the dynamics of 1+1D SU(3) lattice quantum chromodynamics, including a mapping for arbitrary numbers of flavors and lattice size and a re-organization of the Hamiltonian for efficient time-evolution. Recent advances in parallel gate applications, along with the shorter application times of single-qudit operations compared with two-qudit operations, lead to significant projected advantages in quantum simulation fidelities and circuit depths using qu8its rather than qubits. The number of two-qudit entangling gates required for time evolution using qu8its is found to be more than a factor of five fewer than for qubits. We anticipate that the developments presented in this work will enable improved quantum simulations to be performed using emerging quantum hardware.</span></description>
<link>https://inspirehep.net/literature/2770986</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2770986</guid>
<pubDate>Sat, 23 Mar 2024 03:36:02 GMT</pubDate>
<author>Marc Illa (U. Washington, Seattle (main)), Caroline E.P. Robin (Bielefeld U., Darmstadt, GSI), Martin J. Savage (U. Washington, Seattle (main))</author>
<category>quantum simulation</category>
<category>lattice field theory</category>
<category>gate</category>
<category>qubit</category>
<category>SU(3)</category>
<category>Hamiltonian</category>
<category>qudit</category>
<category>entanglement</category>
<category>flavor</category>
</item>
<item>
<title>Improved Fermion Hamiltonians for Quantum Simulation Improved Fermion Hamiltonians for Quantum Simulation</title>
<description><span>We developed a Hamiltonian inspired by ASQTAD and highly improved staggered quark (HISQ) actions and show how these Hamiltonians can be used for quantum simulations. Gate costs for the time evolution of these improved Hamiltonians are provided as well as a demonstration of the reduction of lattice spacing errors using the 1+1d lattice Schwinger model.</span><br><span>We developed a Hamiltonian inspired by ASQTAD and highly improved staggered quark (HISQ) actions and show how these Hamiltonians can be used for quantum simulations. Gate costs for the time evolution of these improved Hamiltonians are provided as well as a demonstration of the reduction of lattice spacing errors using the 1+1d lattice Schwinger model.</span></description>
<link>https://inspirehep.net/literature/2751540</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2751540</guid>
<pubDate>Fri, 26 Jan 2024 15:36:34 GMT</pubDate>
<author>Erik Gustafson (RIACS, Mtn. View, NASA, Ames), Ruth Van de Water (Fermilab)</author>
</item>
<item>
<title>Infinite Temperature is Not So Infinite: The Many Temperatures of de Sitter Space</title>
<description><span>Several distinct concepts of temperature appear in the holographic description of de Sitter space. Conflating these has led to confusion and inconsistent claims. The double-scaled limit of SYK is a concrete model in which we can examine and explain these different concepts of temperature. This note began as an addendum to our paper ``Comments on a Paper by Narovlansky and Verlinde" but in the process of writing it we learned new things -- interesting in their own right -- that we wish to report here.</span></description>
<link>https://inspirehep.net/literature/2747762</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2747762</guid>
<pubDate>Thu, 18 Jan 2024 04:50:41 GMT</pubDate>
<author>Adel A. Rahman, Leonard Susskind</author>
<category>space: de Sitter</category>
<category>temperature: infinite</category>
<category>Verlinde</category>
<category>holography</category>
<category>Sachdev-Ye-Kitaev</category>
<category>entropy</category>
<category>temperature: Hawking</category>
</item>
<item>
<title>Phases of 2d massless QCD with qubit regularization</title>
<description><span>We investigate the possibility of reproducing the continuum physics of 2d SU(N) gauge theory coupled to a single flavor of massless Dirac fermions using qubit regularization. The continuum theory is described by N free fermions in the ultraviolet (UV) and a coset Wess-Zumino-Witten (WZW) model in the infrared (IR). In this work, we explore how well these features can be reproduced using the Kogut-Susskind Hamiltonian with a finite-dimensional link Hilbert space and a generalized Hubbard coupling. Using strong coupling expansions, we show that our model exhibits a gapped dimer phase and another phase described by a spin-chain. Furthermore, for N=2, using tensor network methods, we show that there is a second-order phase transition between these two phases. The critical theory at the transition can be understood as an SU(2)_1 WZW model, using which we determine the phase diagram of our model quantitatively. Using the confinement properties of the model we argue how the UV physics of free fermions could also emerge, but may require further modifications to our model.</span></description>
<link>https://inspirehep.net/literature/2741885</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2741885</guid>
<pubDate>Mon, 01 Jan 2024 03:36:35 GMT</pubDate>
<author>Hanqing Liu (Los Alamos Natl. Lab., Theor. Div.), Tanmoy Bhattacharya (Los Alamos Natl. Lab., Theor. Div.), Shailesh Chandrasekharan (Duke U.), Rajan Gupta (Los Alamos Natl. Lab., Theor. Div.)</author>
<category>expansion: strong coupling</category>
<category>gauge field theory: SU(N)</category>
<category>quantum chromodynamics: massless</category>
<category>fermion: Dirac</category>
<category>network: tensor</category>
<category>regularization</category>
<category>critical phenomena</category>
<category>qubit</category>
<category>Wess-Zumino-Witten model</category>
<category>Hamiltonian</category>
<category>coset space</category>
<category>infrared</category>
<category>Hilbert space</category>
<category>confinement</category>
<category>ultraviolet</category>
<category>flavor</category>
</item>
<item>
<title>Soft Theorems in Matrix Theory</title>
<description><span>We show that the Banks-Fischler-Shenker-Susskind matrix model for M-theory obeys the leading and subleading soft theorems expected from eleven-dimensional supergravity. The subleading soft theorem implies the amplitude is Lorentz symmetric. This is argued for general four point amplitudes, but only for restricted kinematics for five and higher point amplitudes.</span></description>
<link>https://inspirehep.net/literature/2740690</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2740690</guid>
<pubDate>Wed, 27 Dec 2023 03:43:00 GMT</pubDate>
<author>Aidan Herderschee (Princeton, Inst. Advanced Study), Juan Maldacena (Princeton, Inst. Advanced Study)</author>
<category>dimension: 11</category>
<category>matrix model</category>
<category>kinematics</category>
<category>symmetry: Lorentz</category>
<category>M-theory</category>
<category>supergravity: 1</category>
<category>deformation</category>
<category>scattering amplitude</category>
</item>
<item>
<title>Three point amplitudes in matrix theory Three Point Amplitudes in Matrix Theory</title>
<description><span>We compute the three graviton amplitude in the Banks-Fischler-Shenker-Susskind matrix model for M-theory. Even though the three point amplitude is determined by super Poincare invariance in eleven dimensional M-theory, it requires a non-trivial computation in the matrix model. We consider a configuration where all three gravitons carry non-zero longitudinal momentum. To simplify the problem, we compactify one additional dimension and relate the amplitude to a supersymmetric index computation. We find agreement with the expected answer even at finite values of N.</span><br><span>We compute the three graviton amplitude in the Banks-Fischler-Shenker-Susskind matrix model for M-theory. Even though the three point amplitude is determined by super Poincare invariance in eleven dimensional M-theory, it requires a non-trivial computation in the matrix model. We consider a configuration where all three gravitons carry non-zero longitudinal momentum. To simplify the problem, we compactify one additional dimension and relate the amplitude to a supersymmetric index computation. We find agreement with the expected answer even at finite values of $N$.</span></description>
<link>https://inspirehep.net/literature/2739343</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2739343</guid>
<pubDate>Thu, 21 Dec 2023 03:53:36 GMT</pubDate>
<author>Aidan Herderschee (Princeton, Inst. Advanced Study), Juan Maldacena (Princeton, Inst. Advanced Study)</author>
<category>M-theory</category>
<category>string theory</category>
<category>scattering amplitudes</category>
<category>3-point amplitudes</category>
<category>dimension: 11</category>
<category>matrix model</category>
<category>graviton</category>
<category>gravitation</category>
<category>M-theory</category>
<category>Poincare</category>
</item>
<item>
<title>Comments on a Paper by Narovlansky and Verlinde</title>
<description><span>The double-scaled infinite temperature limit of the SYK model has been conjectured by Rahman and Susskind (RS) [1, 2, 3, 4], and independently by Verlinde [5] to be dual to a certain low dimensional de Sitter space. In a recent discussion of this conjecture Narovlansky and Verlinde (NV) [6] came to conclusions which radically differ from those of RS. In particular these conclusions disagree by factors which diverge as $N \to \infty$. Among these is a mismatch between the scaling of boundary entropy and bulk horizon area. In this note, we point out differences in two key assumptions made by RS and NV which lead to these mismatches, and explain why we think the RS assumptions are correct. When the NV assumptions, which we believe are unwarranted, are replaced by those of RS, the conclusions match both RS and the standard relation between entropy and area. In the process of discussing these, we will shed some light on: the various notions of temperature that appear in the duality; the relationship between Hamiltonian energy and bulk mass; and the location of bulk conical defect states in the spectrum of DSSYK$_{\infty}$.</span></description>
<link>https://inspirehep.net/literature/2732691</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2732691</guid>
<pubDate>Fri, 08 Dec 2023 03:43:25 GMT</pubDate>
<author>Adel A. Rahman (Stanford U., ITP, Stanford U.), Leonard Susskind (Stanford U., ITP, Stanford U., Google Inc.)</author>
<category>temperature: infinite</category>
<category>space: de Sitter</category>
<category>Verlinde</category>
<category>duality</category>
<category>entropy</category>
<category>Hamiltonian</category>
<category>defect</category>
<category>scaling</category>
<category>horizon</category>
</item>
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<title>No-Boundary State for Klein Space</title>
<description><span>Analytic continuation from $(3,1)$ signature Minkowski to $(2,2)$ signature Klein space has emerged as a useful tool for the understanding of scattering amplitudes and flat space holography. Under this continuation, past and future null infinity merge into a single boundary ($\mathcal{J}$) which is the product of a null line with a $(1,1)$ signature torus. The Minkowskian $\mathcal{S}$-matrix continues to a Kleinian $\mathcal{S}$-vector which in turn may be represented by a Poincaré-invariant vacuum state $|\mathcal{C}\rangle$ in the Hilbert space built on $\mathcal{J}$. $|\mathcal{C} \rangle$ contains all information about $\mathcal{S}$ in a novel, repackaged form. We give an explicit construction of $|\mathcal{C}\rangle$ in a Lorentz/conformal basis for a free massless scalar. $\mathcal{J}$ separates into two halves $\mathcal{J}_\pm $ which are the asymptotic null boundaries of the regions timelike and spacelike separated from the origin. $|\mathcal{C}\rangle$ is shown to be a maximally entangled state in the product of the $\mathcal{J}_\pm $ Hilbert spaces.</span></description>
<link>https://inspirehep.net/literature/2839379</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2839379</guid>
<pubDate>Mon, 14 Oct 2024 04:09:19 GMT</pubDate>
<author>Walker Melton (Harvard U. (main)), Atul Sharma (Harvard U. (main)), Andrew Strominger (Harvard U. (main)), Tianli Wang (Harvard U. (main))</author>
</item>
<item>
<title>Lower-dimensional models for quantum gravity and black holes: Aspects of holographic dualities in Topological Massive Gravity</title>
<description><span>This thesis focuses on studying and developing quantum gravity models in lower dimensions that include black holes and share features with realistic four-dimensional systems. It follows the gauge/gravity duality framework, originally linking gravitational systems in anti-de Sitter (AdS) spaces to conformal field theory (CFT). The research explores holographic scenarios involving Warped CFT, which may better describe realistic situations.Our work proposes a New Chiral Gravity with particularly simple symmetries. We examine the linearized spin-2 perturbation around the AdS3 background in Topologically Massive Gravity (TMG) with boundary conditions known as Compère-Song-Strominger (CSS) conditions. We demonstrate that at certain coupling points in the theory, black holes have positive energy while the energy of the linearized excitations is non-negative. This could represent one of the simplest, most stable, and coherent gravitational theories, notably including black holes.In the continuation of this thesis, we aim to fill a gap in the study of so-called Warped BTZ spacetimes, which are holographically dual to WCFTs, by establishing boundary conditions that allow for finite charges and a rich phase space containing these WBTZ black holes. We discuss the integrability of these asymptotic charges and their algebras. We show that this leads us to consider two ensembles of boundary conditions, each giving rise to an asymptotic symmetry algebra in what is called the quadratic or the canonical ensemble. We discuss the notion of these ensembles with a view to reproducing the entropy of Warped BTZ black holes by that of a Warped CFT using a Cardy-type formula.Finally, in the last part of this thesis, we address the issue of supersymmetry in Warped BTZ spacetimes. In particular, we use the fact that WBTZ spacetimes can be studied as exact string theories to examine their supersymmetric properties within type IIB supergravity</span></description>
<link>https://inspirehep.net/literature/2837496</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2837496</guid>
<pubDate>Mon, 07 Oct 2024 18:38:02 GMT</pubDate>
<author>Antoine Somerhausen (Brussels U.)</author>
<category>Quantum Gravity</category>
<category>holographic duality</category>
</item>
<item>
<title>3d Mirror Symmetry is Mirror Symmetry</title>
<description><span>3d mirror symmetry is a mysterious duality for certian pairs of hyperkähler manifolds, or more generally complex symplectic manifolds/stacks. In this paper, we will describe its relationships with 2d mirror symmetry. This could be regarded as a 3d analog of the paper "Mirror Symmetry is T-Duality" by Strominger, Yau and Zaslow which described 2d mirror symmetry via 1d dualities.</span></description>
<link>https://inspirehep.net/literature/2837463</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2837463</guid>
<pubDate>Mon, 07 Oct 2024 15:36:10 GMT</pubDate>
<author>Ki Fung Chan, Naichung Conan Leung</author>
</item>
<item>
<title>Recent Developments in Heterotic Moduli</title>
<description><span>We review recent results for heterotic moduli and the Hull--Strominger system. In particular, we discuss mathematical properties of the recently derived deformation operator $\bar D$ associated to the deformation complex of heterotic $SU(3)$ solutions. We review results on Serre duality, showing that the operator has a vanishing index, and discuss a notion of Čech cohomology and a particular instance of a Dolbeault theorem for $\bar D$. Specifically, the cohomology parametrising infinitesimal deformations is isomorphic to the first Čech cohomology of an associated cochain complex. This will be useful for future research, as it provides a more algebraic handle on the heterotic moduli problem, which is useful for understanding notions of stability, geometric invariants, and enumerative geometry for the Hull--Strominger system.</span></description>
<link>https://inspirehep.net/literature/2833097</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2833097</guid>
<pubDate>Thu, 26 Sep 2024 04:34:22 GMT</pubDate>
<author>Javier José Murgas Ibarra (Stavanger U.), Eirik Eik Svanes (Stavanger U.)</author>
<category>operator, deformation</category>
<category>heterotic</category>
<category>moduli</category>
<category>cohomology</category>
<category>duality</category>
<category>algebra</category>
<category>geometry</category>
<category>SU(3)</category>
<category>stability</category>
</item>
<item>
<title>Geometry of heterotic flux compactifications</title>
<description><span>This thesis delves into recent developments in the study of flux compactifications of the heterotic string theory. We primarily focus on four-dimensional Minkowski compactifications with spacetime supersymmetry, whose underlying six-dimensional geometries are, in the presence of torsion, non-Kähler SU(3) structure manifolds. We develop several methods to analyze these compactifications from both supergravity and worldsheet perspectives. We investigate geometric flows in non-Kähler geometry that play a central role in the study of the Hull-Strominger equations, and elucidate their supersymmetry properties. We present a class of orbifold backgrounds that can be described using torsional linear sigma models with (0,2) worldsheet supersymmetry, and obtain new examples of heterotic flux backgrounds. Finally, we explore the implications of Narain T-duality for the moduli space of torsional heterotic vacua, and find evidence for topology change and Kähler/non-Kähler dualities.</span></description>
<link>https://inspirehep.net/literature/2827368</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2827368</guid>
<pubDate>Thu, 12 Sep 2024 08:54:37 GMT</pubDate>
<author>Yann Proto (Paris, LPTHE)</author>
<category>Heterotic string theory</category>
<category>Flux compactifications</category>
<category>Non-Kähler geometry</category>
<category>Supersymmetric gauge theories</category>
<category>Théorie des cordes hétérotique</category>
<category>Compactifications avec flux</category>
<category>Géométrie non-Kählérienne</category>
<category>Théories de jauge supersymétriques</category>
</item>
<item>
<title>Neutral particle collisions near Gibbons-Maeda-Garfinkle-Horowitz-Strominger black holes after shadow observations</title>
<description><span>A Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black hole with a magnetic charge (or an electric charge) has noteworthy features that its scalar curvature near the event horizon of the black hole with the almost maximal charge can be extremely large. The large curvature, which is related with the gravity on a finite-sized object or between two points, causes high center-of-mass energy for two neutral particles near the almost maximally charged GMGHS black hole. Recently, the Event Horizon Telescope Collaboration gave the bound on the charge of black holes from the shadow and mass observations of black holes under an assumption that the diameter of observed rings are proportion to that of photon spheres. The photon sphere would be less related with the curvature, since it is determined by the behavior of one photon or one ray neither two photons nor two rays. Thus, the high-energy neutral particle collision and the black hole shadow observations would be complementary to distinguish the GMGHS black hole from other black hole solutions. In this paper, we investigate a new way to compare the center-of-mass energy for neutral particle collisions in the GMGHS spacetime and other black hole spacetimes. From the shadow observations and the mass observations under the assumptions on the effect of black hole charges, we can put constraints on the center-of-mass energy of the particles. We apply our method to shadow and mass observations of M87* and Sagittarius~A*. We find that the center-of-mass energy of neutral particles near the GMGHS black holes cannot be extremely large under the observational constraints, and conclude that the GMGHS spacetimes are hardly distinguishable from the Reissner-Nordström spacetimes by the particle collisions if we apply the shadow and mass observations at $1 \sigma$ probability.</span></description>
<link>https://inspirehep.net/literature/2826329</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2826329</guid>
<pubDate>Tue, 10 Sep 2024 04:39:42 GMT</pubDate>
<author>Naoki Tsukamoto, Ryotaro Kase</author>
</item>
<item>
<title>Local descriptions of the heterotic SU(3) moduli space</title>
<description><span>The heterotic $SU(3)$ system, also known as the Hull--Strominger system, arises from compactifications of heterotic string theory to six dimensions. This paper investigates the local structure of the moduli space of solutions to this system on a compact 6-manifold $X$, using a vector bundle $Q=(T^{1,0}X)^* \oplus {End}(E) \oplus T^{1,0}X$, where $E\to X$ is the classical gauge bundle arising in the system. We establish that the moduli space has an expected dimension of zero. We achieve this by studying the deformation complex associated to a differential operator $\bar{D}$, which emulates a holomorphic structure on $Q$, and demonstrating an isomorphism between the two cohomology groups which govern the infinitesimal deformations and obstructions in the deformation theory for the system. We also provide a Dolbeault-type theorem linking these cohomology groups to Čech cohomology, a result which might be of independent interest, as well as potentially valuable for future research.</span></description>
<link>https://inspirehep.net/literature/2825826</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2825826</guid>
<pubDate>Mon, 09 Sep 2024 04:12:31 GMT</pubDate>
<author>Hannah de Lázari, Jason D. Lotay, Henrique Sá Earp, Eirik Eik Svanes</author>
</item>
<item>
<title>Landau-Ginzburg models, Monge-Ampere domains and (pre-)Frobenius manifolds</title>
<description><span>Kontsevich suggested that the Landau-Ginzburg model presents a good formalism for homological mirror symmetry. In this paper we propose to investigate the LG theory from the viewpoint of Koopman-von Neumann's construction. New advances are thus provided, namely regarding a conjecture of Kontsevich--Soibelman (on a version of the Strominger-Yau-Zaslow mirror problem). We show that there exists a Monge--Ampere domain Y, generated by a space of probability densities parametrising mirror dual Calabi-Yau manifolds. This provides torus fibrations over Y. The mirror pairs are obtained via the Berglund-Hubsch-Krawitz construction. We also show that the Monge-Ampere manifolds are pre-Frobenius manifolds. Our method allows to recover certain results concerning Lagrangian torus fibrations. We illustrate our construction on a concrete toy model, which allows us, additionally to deduce a relation between von Neumann algebras,, Monge--Ampere manifolds and pre-Frobenius manifolds.</span></description>
<link>https://inspirehep.net/literature/2824461</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2824461</guid>
<pubDate>Wed, 04 Sep 2024 06:16:50 GMT</pubDate>
<author>Noemie C. Combe</author>
</item>
<item>
<title>Celestial Dual for Maximal Helicity Violating Amplitudes A Celestial Dual for MHV Amplitudes</title>
<description><span>It is shown that a 2D conformal field theory consisting of a central charge <math display="inline"><mi>c</mi></math> Liouville theory, a chiral level one, rank <math display="inline"><mi>N</mi></math> Kac-Moody algebra, and a weight <math display="inline"><mo>-</mo><mn>3</mn><mo>/</mo><mn>2</mn></math> free fermion holographically generate 4D maximal helicity violating tree-level scattering amplitudes. The correlators of this 2D conformal field theory give directly the 4D leaf amplitudes associated to a single hyperbolic slice of flat space. The 4D celestial amplitudes arise in a large-<math display="inline"><mi>N</mi></math> and semiclassical large-<math display="inline"><mi>c</mi></math> limit, according to the holographic dictionary, as a translationally invariant combination of leaf amplitudes. A step in the demonstration is showing that the semiclassical limit of Liouville correlators are given by contact 3D anti–de Sitter Witten diagrams.</span><br><span>It is shown that a 2D CFT consisting of a central charge $c$ Liouville theory, a chiral level one, rank $N$ Kac-Moody algebra and a weight $-3/2$ free fermion holographically generate 4D MHV tree-level scattering amplitudes. The correlators of this 2D CFT give directly the 4D leaf amplitudes associated to a single hyperbolic slice of flat space. The 4D celestial amplitudes arise in a large-$N$ and semiclassical large-$c$ limit, according to the holographic dictionary, as a translationally-invariant combination of leaf amplitudes. A step in the demonstration is showing that the semiclassical limit of Liouville correlators are given by contact AdS$_3$ Witten diagrams.</span></description>
<link>https://inspirehep.net/literature/2823172</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2823172</guid>
<pubDate>Fri, 30 Aug 2024 17:12:13 GMT</pubDate>
<author>Walker Melton (Harvard U. (main)), Atul Sharma (Harvard U. (main)), Andrew Strominger (Harvard U. (main)), Tianli Wang (Harvard U. (main))</author>
<category>field theory: conformal</category>
<category>algebra: Kac-Moody</category>
<category>maximally helicity violating amplitude</category>
<category>dimension: 4</category>
<category>dimension: 2</category>
</item>
<item>
<title>Stability and phase transition of black holes in Einstein-Maxwell-dilaton gravity</title>
<description><span>In this research, we study black hole stability and phase transition in Einstein-Maxwell-dilaton (EMD) gravity. A dilaton field is non-minimally related to the Maxwell field in the EMD gravity and is an intriguing alternative for General Relativity. By using the thermodynamic laws of the black holes, temperature, entropy, heat capacity, pressure, critical points and Gibbs free energy of charged static dilaton black holes in EMD gravity were all thoroughly explored and effects of dilaton constant on these quantities are studied and the results are compared with Schwarzschild, Reissner-Nordström, and Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black holes. In other cases, the system has stable and unstable areas. Since the heat capacity is discontinuous, the system experiences a phase transition, and Van der Waals-like phase transitions occur between the small and large black holes. It has been observed that the heat capacity for the GMGHS and Schwarzschild black holes is always negative, making these systems unstable.</span></description>
<link>https://inspirehep.net/literature/2822301</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2822301</guid>
<pubDate>Wed, 28 Aug 2024 07:02:04 GMT</pubDate>
<author>K. Ghaderi (Islamic Azad U., Iran), Anirudh Pradhan (GLA U., Mathura, Shiv Nadar U.), A. Mahmoodzadeh (Islamic Azad U., Sanandaj)</author>
<category>Black holes</category>
<category>Thermodynamic</category>
<category>Einstein-Maxwell-dilaton</category>
<category>Gravitation</category>
</item>
<item>
<title>Pluriclosed flow and the Hull-Strominger system</title>
<description><span>We define a natural extension of pluriclosed flow aiming at constructing solutions of the Hull-Strominger system. We give several geometric formulations of this flow, which yield a series of a priori estimates for the flow and also for the Hull-Strominger system. The evolution equations are derived using the theory of string algebroids, a class of Courant algebroids which occur naturally in higher gauge theory. Using this, we interpret the flow as generalized Ricci flow and also as a higher/coupled version of Hermitian-Yang-Mills flow, proving furthermore that it is compatible with symmetry reduction. Regarding our main analytical results, we prove a priori $C^{\infty}$ estimates for uniformly parabolic solutions. This in particular settles the question of smooth regularity of uniformly elliptic solutions of the Hull-Strominger system, generalizing Yau's $C^3$ estimate for the complex Monge-Ampère equation. We prove global existence and convergence results for the flow on special backgrounds, and discuss a conjectural relationship of the flow to the geometrization of Reid's fantasy.</span></description>
<link>https://inspirehep.net/literature/2820390</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2820390</guid>
<pubDate>Thu, 22 Aug 2024 05:50:54 GMT</pubDate>
<author>Mario Garcia-Fernandez, Raul Gonzalez Molina, Jeffrey Streets</author>
</item>
<item>
<title>Accretion disks around magnetically charged black holes in string theory with Euler-Heisenberg correction</title>
<description><span>A relativistic model of geometrically thin and optically thick accretion disks is worked out for a class of magnetically charged black holes, which are solutions to the Einstein-Maxwell-dilaton theory with a dilaton-coupled Euler-Heisenberg correction. Constraints on black hole parameters are derived from subextremality condition and energy conditions. The Keplerian orbits, the time-averaged energy flux, the local temperature, the specific luminosity and the conversion efficiency of accreting mass into radiation are obtained and compared with Schwarzschild and Gibbons-Maeda-Garfinkle-Horowitz-Strominger black holes.</span></description>
<link>https://inspirehep.net/literature/2819224</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2819224</guid>
<pubDate>Tue, 20 Aug 2024 04:24:19 GMT</pubDate>
<author>Yu-Hao Jiang (East China Normal U.), Towe Wang (East China Normal U.)</author>
</item>
<item>
<title>Quantum obesity and steering ellipsoids for fermionic fields in Garfinkle-Horowitz-Strominger dilation spacetime</title>
<description><span>This paper investigates quantum obesity (QO), quantum discord (QD), and the quantum steering ellipsoid (QSE) for bipartite Gisin states subjected to Garfinkle-Horowitz-Strominger (GHS) dilation of spacetime on the second qubit. These three quantifiers are introduced to characterize quantum correlations beyond entanglement and can also function as entanglement witnesses. Our results demonstrate a monotonic decrease in the physical accessibility of both QD and QO as the dilation parameter increases within the region-I of the second qubit. Conversely, in the anti-particle region, the accessibility of QD and QO stabilizes at finite values of the dilation parameter owing to the influence of the Pauli exclusion principle and Fermi-Dirac statistics, subsequently increasing gradually. Notably, the QSE in the region-I expands as the Dirac field frequency rises and the dilation parameter diminishes, while the opposite trend is observed in the anti-particle region.</span></description>
<link>https://inspirehep.net/literature/2817762</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2817762</guid>
<pubDate>Wed, 14 Aug 2024 04:22:06 GMT</pubDate>
<author>Samira Elghaayda (Hassan U., II, Ain Chock), M.Y. Abd-Rabbou (Beijing, GUCAS, Al-Azhar U., Cairo), Mostafa Mansour (Hassan U., II, Ain Chock)</author>
</item>
<item>
<title>Notes on Characterizations of 2d Rational SCFTs: Algebraicity, Mirror Symmetry and Complex Multiplication</title>
<description><span>These notes combine results from two papers by the present authors viz., Part I (arXiv:2205.10299) and Part II (arXiv:2212.13028) into one streamlined version for better readability, along with a review on theory of complex multiplication for non-singular complex projective varieties and complex tori that is aimed at string theorists. We think that it is worth posting this edition as a separate entry in arXiv for those reasons, although this edition contains no essential progress beyond Part I and Part II. S. Gukov and C. Vafa proposed a characterization of rational N=(1,1) superconformal field theories (SCFTs) on 1+1 dimensions with Ricci-flat Kahler target spaces in terms of the Hodge structure of the target space, extending an earlier observation by G. Moore. We refined this idea and obtained a conjectural statement on necessary and sufficient conditions for such SCFTs to be rational, which we indeed prove to be true in the case the target space is T^4. In the refined statement, the algebraicity of the geometric data of the target space turns out to be essential, and the Strominger--Yau--Zaslow fibration in the mirror correspondence also plays a vital role.</span></description>
<link>https://inspirehep.net/literature/2814123</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2814123</guid>
<pubDate>Mon, 05 Aug 2024 04:09:41 GMT</pubDate>
<author>Abhiram Kidambi (Leipzig, Max Planck Inst., Schrodinger Inst., Vienna, Vienna U.), Masaki Okada (Tokyo U., IPMU), Taizan Watari (Tokyo U., IPMU)</author>
</item>
<item>
<title>Interacting Null Sources in Different Geometries</title>
<description><span>We introduce basic mathematical techniques, followed by an exploration of three distinct topics: the Callan-Giddings-Harvey-Strominger (CGHS) model in 1+1-dimensional spacetime, the formation of astrophysical jets in Schwarzschild-like black holes, and collisions and confinement phenomena in the third-order Lovelock gravity. In the CGHS model, we investigate the collision of ghost fields within the dilaton background geometry, observing the formation and dissolution of wormholes by inserting and removing the ghost fields, respectively. This process mimics a cosmological-scale analogue of Feynman diagrams. Next, we study the non-zero expectation values of bumblebee fields due to Lorentz symmetry breaking. This alteration in the energy-momentum tensor necessitates the inclusion of a potential vacuum, resulting in a shift of the vacuum solution towards Schwarzchild-like black holes with a scaling factor $l$. This scaling factor facilitates discussions on the collision of null sources, leading to the formation of impulsive null shells and satisfying the type-D condition. When $l$ approaches zero, jet-like formations vanish, transforming the problem into one involving colliding gravitational waves, which is isometric to the Schwarzschild geometry. Moreover, our method can be applied to any resembling Schwarzschild-like metrics. We aim to enhance our model by incorporating additional physical factors such as extra polarizations or EM fields. Finally, our examination extends to the 4-dimensional third-order Lovelock gravity, observing that particles possess finite energy and be confined within the metric time interval extending from - to + infinity. Moreover, this finding does not admit flat rotation curves. Additionally, when collisions occur within the background of this metric, intriguingly, we observe impulsive Weyl curvatures along the null boundaries subsequent to the collision.</span></description>
<link>https://inspirehep.net/literature/2811072</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2811072</guid>
<pubDate>Fri, 26 Jul 2024 04:21:44 GMT</pubDate>
<author>Chia-Li Hsieh</author>
</item>
<item>
<title>The TTbar deformation and zeta functions in 3D gravity</title>
<description><span>This thesis explores two topics in three-dimensional gravity, the $\ttb$ deformation and zeta functions of three-dimensional quotient manifolds.The $\ttb$ deformation is an irrelevant deformation of a two-dimensional translationally invariant quantum field theory which is well-behaved in the UV.We consider the case of two-dimensional holographic Warped Conformal Field theories (WCFTs), which are dual to gravity in three-dimensional anti-de Sitter (AdS$_3$) spacetime with Compere, Song, Strominger (CSS) boundary conditions.WCFTs are non-relativistic quantum field theories which have a Virasoro$\times \rm U(1)$ Kac-Moody symmetry algebra. We compute the boundary conditions and asymptotic symmetry algebra for a $\ttb$ deformed WCFT.We find that the $\rm U(1)$ Kac-Moody algebra survives the deformation if one allows the boundary metric to transform appropriately under the asymptotic symmetries, however the Virasoro sector becomes highly deformed and is no longer chiral. The Selberg zeta function is defined by the Euler product over prime geodesics on a hyperbolic quotient manifold.It provides a simpler way to compute functional determinants of kinetic operators compared to traditional means. We introduce a new construction of a zeta function, which generalizes the Selberg zeta function to non-hyperbolic quotient manifolds.We employ our generalization to quotients of three-dimensional Warped AdS$_3$ and three-dimensional flat spacetime.We find that the zeroes of the zeta function accurately predicts the quasi-normal mode spectrum in these non-hyperbolic cases, providing evidence for the proposed construction of the zeta function.</span></description>
<link>https://inspirehep.net/literature/2810950</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2810950</guid>
<pubDate>Thu, 25 Jul 2024 12:44:45 GMT</pubDate>
<author>Rahul Poddar (Iceland U.)</author>
<category>Eðlisfræði (námsgrein)</category>
</item>
<item>
<title>Chiral Soft Algebras for $\mathcal{N} = 2$ Gauge Theory</title>
<description><span>Some time ago, Seiberg and Witten solved for moduli spaces of vacua parameterized by scalar vacuum expectation values in $\mathcal{N}=2$ gauge theories. More recently, new vacua associated to soft theorems and asymptotic symmetries have been found. This paper takes some first steps towards a complete picture of the infrared geometry of $\mathcal{N}=2$ gauge theory incorporating both of these infrared structures.</span></description>
<link>https://inspirehep.net/literature/2810696</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2810696</guid>
<pubDate>Thu, 25 Jul 2024 04:18:56 GMT</pubDate>
<author>Erin Crawley (Harvard U. (main)), Andrew Strominger (Harvard U. (main)), Adam Tropper (Harvard U. (main))</author>
</item>
<item>
<title>Nonlocal advantage of quantum coherence under Garfinkle-Horowitz-Strominger dilation space-time</title>
<description><span>Nonlocal advantage of quantum coherence (NA-QC) is a relatively robust non-classical correlation and can be achieved by coherence complementary relations. In this work, we investigate NA-QC based on various coherence measures within the theoretical framework of a Garfinkle-Horowitz-Strominger dilation black hole. Interestingly, NA-QC exhibits monotonically decreasing evolutionary features with the growing dilation parameter in the physically accessible regions. Furthermore, the hierarchical relationship among NA-QC, quantum steerability and Bell-nonlocality is analyzed under the influence of Hawking radiation. It is shown that NA-QC is a subset of Bell-nonlocality and quantum steering is a superset of Bell-nonlocality. Additionally, to achieve more quantum resources, we propose a feasible physical scheme to control NA-QC by using optimal parity-time ()-symmetric operations. The amount of NA-QC can be effectively enhanced in the certain time interval for the physical accessible state in the context of black hole. These results might play important roles for understanding quantum information theory under the curved space-time.</span></description>
<link>https://inspirehep.net/literature/2807116</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2807116</guid>
<pubDate>Sat, 13 Jul 2024 09:40:23 GMT</pubDate>
<author>Fei Ming (Anhui U.), Bao-Long Fang (Anhui U.), Xueyou Hu (Anhui U.), Yang Yu (Anhui U.), Dong Wang (Anhui U.)</author>
<category>nonlocal advantage of quantum coherence</category>
<category>Garfinkle-Horowitz-Strominger dilation black hole</category>
<category>quantum steering</category>
<category>Bell-nonlocality</category>
</item>
<item>
<title>The Memory of Primordial Gravitational Waves</title>
<description><span>Primordial gravitational waves, after they enter the horizon and decay away, leave a residual displacement in test particles: a memory, in analogy with gravitational waves generated by astrophysical sources. The displacement in the distance between test particles $\xi^i$ does not depend on the cosmological evolution, but only on the primordial value $\bar h^i_{j}$ of the gravitational wave: $\Delta \xi^i = -\frac 12 \bar h^i_{j} \xi^j$. The memory is thus related to the adiabatic tensor mode that maps the unperturbed FLRW geometries at early and late times; this is analogous to the relation between memory in Minkowski spacetime and the BMS group. The primordial memory is also connected to the consistency relations of cosmological correlators, as the flat-space memory is related to the soft theorems for gravitational wave emission. We comment on the signature of the effect on the CMB $B$-modes and on the large-scale structure. There is also a primordial memory effect that is subleading in the spatial gradients of the wave: it is encoded in the rotation of free-falling gyroscopes.</span></description>
<link>https://inspirehep.net/literature/2806839</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2806839</guid>
<pubDate>Fri, 12 Jul 2024 04:20:17 GMT</pubDate>
<author>Paolo Creminelli (ICTP, Trieste, IFPU, Trieste), Filippo Vernizzi (IPhT, Saclay)</author>
</item>
<item>
<title>The Black Hole Explorer: motivation and vision The Black Hole Explorer: Motivation and Vision</title>
<description><span>We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry (VLBI) to space. BHEX will discover and measure the bright and narrow “photon ring” that is predicted to exist in images of black holes, produced from light that has orbited the black hole before escaping. This discovery will expose universal features of a black hole’s spacetime that are distinct from the complex astrophysics of the emitting plasma, allowing the first direct measurements of a supermassive black hole’s spin. In addition to studying the properties of the nearby supermassive black holes M87∗ and Sgr A∗ , BHEX will measure the properties of dozens of additional supermassive black holes, providing crucial insights into the processes that drive their creation and growth. BHEX will also connect these supermassive black holes to their relativistic jets, elucidating the power source for the brightest and most efficient engines in the universe. BHEX will address fundamental open questions in the physics and astrophysics of black holes that cannot be answered without submillimeter space VLBI. The mission is enabled by recent technological breakthroughs, including the development of ultra-high-speed downlink using laser communications, and it leverages billions of dollars of existing ground infrastructure. We present the motivation for BHEX, its science goals and associated requirements, and the pathway to launch within the next decade.</span><br><span>We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry (VLBI) to space. BHEX will discover and measure the bright and narrow "photon ring" that is predicted to exist in images of black holes, produced from light that has orbited the black hole before escaping. This discovery will expose universal features of a black hole's spacetime that are distinct from the complex astrophysics of the emitting plasma, allowing the first direct measurements of a supermassive black hole's spin. In addition to studying the properties of the nearby supermassive black holes M87* and Sgr A*, BHEX will measure the properties of dozens of additional supermassive black holes, providing crucial insights into the processes that drive their creation and growth. BHEX will also connect these supermassive black holes to their relativistic jets, elucidating the power source for the brightest and most efficient engines in the universe. BHEX will address fundamental open questions in the physics and astrophysics of black holes that cannot be answered without submillimeter space VLBI. The mission is enabled by recent technological breakthroughs, including the development of ultra-high-speed downlink using laser communications, and it leverages billions of dollars of existing ground infrastructure. We present the motivation for BHEX, its science goals and associated requirements, and the pathway to launch within the next decade.</span></description>
<link>https://inspirehep.net/literature/2800562</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2800562</guid>
<pubDate>Fri, 21 Jun 2024 04:16:59 GMT</pubDate>
<author>Michael D. Johnson, Kazunori Akiyama, Rebecca Baturin, Bryan Bilyeu, Lindy Blackburn, Don Boroson, Alejandro Cardenas-Avendano, Andrew Chael, Chi-kwan Chan, Dominic Chang, Peter Cheimets, Cathy Chou, Sheperd S. Doeleman, Joseph Farah, Peter Galison, Ronald Gamble, Charles F. Gammie, Zachary Gelles, Jose L. Gomez, Samuel E. Gralla, Paul Grimes, Leonid I. Gurvits, Shahar Hadar, Kari Haworth, Kazuhiro Hada, Michael H. Hecht, Mareki Honma, Janice Houston, Ben Hudson, Sara Issaoun, He Jia, Svetlana Jorstad, Jens Kauffmann, Yuri Y. Kovalev, Peter Kurczynski, Robert E. Lafon, Alexandru Lupsasca, Robert Lehmensiek, Chung-Pei Ma, Daniel P. Marrone, Alan P. Marscher, Gary J. Melnick, Ramesh Narayan, Kotaro Niinuma, Scott C. Noble, Eric J. Palmer, Daniel C.M. Palumbo, Lenny Paritsky, Eliad Peretz, Dominic Pesce, Alexander Plavin, Eliot Quataert, Hannah Rana, Angelo Ricarte, Freek Roelofs, Katia Shtyrkova, Laura C. Sinclair, Jeffrey Small, Sridharan Tirupati Kumara, Ranjani Srinivasan, Andrew Strominger, Paul Tiede, Edward Tong, Jade Wang, Jonathan Weintroub, Maciek Wielgus, George Wong, Xinyue Alice Zhang</author>
</item>
<item>
<title>Coupled $\operatorname{G}_2$-instantons</title>
<description><span>We introduce the coupled instanton equations for a metric, a spinor, a three-form, and a connection on a bundle, over a spin manifold. Special solutions in dimensions $6$ and $7$ arise, respectively, from the Hull--Strominger and the heterotic $\operatorname{G}_2$ system. The equations are motivated by recent developments in theoretical physics and can be recast using generalized geometry; we investigate how coupled instantons relate to generalized Ricci-flat metrics and also to Killing spinors on a Courant algebroid. We present two open questions regarding how these different geometric conditions are intertwined, for which a positive answer is expected from recent developments in the physics literature by De la Ossa, Larfors and Svanes, and in the mathematics literature on Calabi--Yau manifolds, in recent work by the second-named author with González Molina. We give a complete solution to the first of these problems, providing a new method for the construction of instantons in arbitrary dimensions. For $\operatorname{G}_2$-structures with torsion coupled to $\operatorname{G}_2$-instantons, in dimension $7$, we also establish results around the second problem. The last part of the present work carefully studies the approximate solutions to the heterotic $\operatorname{G}_2$-system constructed by the third and fourth authors on contact Calabi--Yau $7$-manifolds, for which we prove the existence of approximate coupled $\operatorname{G}_2$-instantons and generalized Ricci-flat metrics.</span></description>
<link>https://inspirehep.net/literature/2779261</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2779261</guid>
<pubDate>Mon, 22 Apr 2024 03:41:47 GMT</pubDate>
<author>Agnaldo A. da Silva, Mario Garcia-Fernandez, Jason D. Lotay, Henrique N. Sá Earp</author>
</item>
<item>
<title>New Euclidean axion wormholes</title>
<description><span>In my presentation I discuss recent progress in search for new Euclidean wormhole solutions, a topic which is based on research started with Valery Rubakov and Peter Tinyakov back in 1988. In current study we investigate extension of axion gravity (studied by Giddings and Strominger), with an extra massive dilaton field or scalar field with symmetric double well potential. We found that in both theories new types of wormhole solutions exist and investigated their properties as a function of parameters of the model (axion charge, dilatonic coupling constant etc.) Euclidean actions of these new wormholes are typically comparable with actions of Giddings-Strominger type wormholes. These new types of wormholes are leading to expanding baby universes after analytic continuation back to Minkowski signature, whereas Giddings-Strominger wormholes are leading to contracting baby universes.In addition rich structures of generalized Giddings-Strominger wormholes are found in axion gravity with massive dilaton. Presentation is based on a recent new results obtained in 2023 in collaboration with Caroline Jonas and Jean-Luc Lehners.</span></description>
<link>https://inspirehep.net/literature/2777154</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2777154</guid>
<pubDate>Mon, 15 Apr 2024 15:53:08 GMT</pubDate>
<author>George Lavrelashvili (Javakhishvili State U.)</author>
<category>gravitation: axion</category>
<category>dilaton: massive</category>
<category>wormhole: Euclidean</category>
<category>axion: Euclidean</category>
<category>action: Euclidean</category>
<category>field theory: scalar</category>
<category>Minkowski</category>
<category>structure</category>
<category>coupling constant</category>
<category>signature</category>
<category>potential: scalar</category>
<category>cosmological model</category>
<category>space-time: expansion</category>
</item>
<item>
<title>The Kerr Memory Effect at Null Infinity</title>
<description><span>We compute the memory effect due to a gravitational wave striking a Kerr black hole as seen by an observer at null infinity. This is done by working in Bondi--Sachs coordinates. It was shown by Hawking, Perry, and Strominger (HPS) that the memory effect due to a gravitational shockwave is seen as a pure BMS supertranslation from null infinity. Hence, it is of interest to compute the supertranslated Kerr solution in Bondi--Sachs coordinates. Finally, the gravitational wave is said to implant soft supertranslation hair on the event horizon of the black hole which carries superrotation charge. We will explicitly calculate the change in superrotation charge on the event horizon due to the supertranslation hair.</span></description>
<link>https://inspirehep.net/literature/2767785</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2767785</guid>
<pubDate>Wed, 13 Mar 2024 05:06:14 GMT</pubDate>
<author>Rudeep Gaur (Victoria U., Wellington)</author>
<category>black hole: horizon</category>
<category>black hole: Kerr</category>
<category>black hole: hair</category>
<category>gravitational radiation</category>
<category>HPS</category>
<category>gravitation: effect</category>
<category>asymptotic behavior</category>
<category>shock waves</category>
<category>supersymmetry</category>
<category>symmetry: translation</category>
<category>black hole: charge</category>
<category>rotation</category>
<category>Black holes</category>
<category>Kerr</category>
<category>BMS</category>
<category>Memory effect</category>
<category>Supertranslations</category>
</item>
<item>
<title>The Strominger System and Flows by the Ricci Tensor</title>
<description><span>This is a survey on the Strominger system and a geometric flow known as the anomaly flow. We will discuss various aspects of non-Kähler geometry on Calabi-Yau threefolds. Along the way, we discuss balanced metrics and balanced classes, the Aeppli cohomology class associated to a solution to the Strominger system, the equations of motion of heterotic supergravity, and a version of Ricci flow in this special geometry.</span></description>
<link>https://inspirehep.net/literature/2762770</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2762770</guid>
<pubDate>Thu, 29 Feb 2024 03:59:21 GMT</pubDate>
<author>Sébastien Picard</author>
<category>flow: Ricci</category>
<category>tensor: Ricci</category>
<category>supergravity: heterotic</category>
<category>Kaehler</category>
<category>space: Calabi-Yau</category>
<category>anomaly</category>
<category>field equations</category>
<category>cohomology</category>
<category>differential geometry</category>
</item>
<item>
<title>Exact black holes in string-inspired Euler-Heisenberg theory Exact black holes in string-inspired Euler-Heisenberg theory</title>
<description><span>We consider higher-order derivative gauge field corrections that arise in the fundamental context of dimensional reduction of string theory and Lovelock-inspired gravities and obtain an exact and asymptotically flat black hole solution, in the presence of nontrivial dilaton configurations. Specifically, by considering the gravitational theory of Euler-Heisenberg nonlinear electrodynamics coupled to a dilaton field with specific coupling functions, we perform an extensive analysis of the characteristics of the black hole, including its geodesics for massive particles, the energy conditions, thermodynamical and stability analysis. The inclusion of a dilaton scalar potential in the action can also give rise to asymptotically (anti) de Sitter spacetimes and an effective cosmological constant. Moreover, we find that the black hole can be thermodynamically favored when compared to the Gibbons-Maeda-Garfinkle-Horowitz-Strominger black hole for those parameters of the model that lead to a larger black hole horizon for the same mass. Finally, it is observed that the energy conditions of the obtained black hole are indeed satisfied, further validating the robustness of the solution within the theoretical framework, but also implying that this self-gravitating dilaton-nonlinear-electrodynamics system constitutes another explicit example of bypassing modern versions of the no-hair theorem without any violation of the energy conditions.</span><br><span>We consider higher-order derivative gauge field corrections that arise in the fundamental context of dimensional reduction of String Theory and Lovelock-inspired gravities and obtain an exact and asymptotically flat black-hole solution, in the presence of non-trivial dilaton configurations. Specifically, by considering the gravitational theory of Euler-Heisenberg non-linear electrodynamics coupled to a dilaton field with specific coupling functions, we perform an extensive analysis of the characteristics of the black hole, including its geodesics for massive particles, the energy conditions, thermodynamical and stability analysis. The inclusion of a dilaton scalar potential in the action can also give rise to asymptotically (A)dS spacetimes and an effective cosmological constant. Moreover, we find that the black hole can be thermodynamically favored when compared to the Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black hole for those parameters of the model that lead to a larger black-hole horizon for the same mass. Finally, it is observed that the energy conditions of the obtained black hole are indeed satisfied, further validating the robustness of the solution within the theoretical framework, but also implying that this self-gravitating dilaton-non-linear-electrodynamics system constitutes another explicit example of bypassing modern versions of the no-hair theorem without any violation of the energy conditions.</span></description>
<link>https://inspirehep.net/literature/2759932</link>
<guid isPermaLink="false">https://inspirehep.net/literature/2759932</guid>
<pubDate>Wed, 21 Feb 2024 03:46:01 GMT</pubDate>
<author>Athanasios Bakopoulos (Natl. Tech. U., Athens), Thanasis Karakasis (Natl. Tech. U., Athens), Nick E. Mavromatos (Natl. Tech. U., Athens, King's Coll. London), Theodoros Nakas (Natl. Tech. U., Athens), Eleftherios Papantonopoulos (Natl. Tech. U., Athens)</author>
<category>electromagnetic field: coupling</category>
<category>potential: scalar</category>
<category>dilaton: scalar</category>
<category>black hole: horizon</category>
<category>electromagnetic field: nonlinear</category>
<category>energy: violation</category>
<category>particle: massive</category>
<category>gravitation</category>
<category>dimensional reduction</category>
<category>space-time</category>
<category>thermodynamical</category>
<category>string</category>
<category>cosmological constant</category>
<category>gauge field theory</category>
<category>stability</category>
<category>higher-order</category>
</item>
</channel>
</rss> |
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It works with the latest content being returned. |
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不是，我的意思是 可以return内容，但是过段时间订阅就会失效 |
This was referenced Nov 13, 2024
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