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Fix Yao extension by properly transposing matrices #212

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merged 6 commits into from
Oct 1, 2024
Merged

Fix Yao extension by properly transposing matrices #212

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e9fa9c8
Transpose the matrix from Yao Blocks
jofrevalles Sep 26, 2024
ff5002e
Enhance Yao extension tests
jofrevalles Sep 26, 2024
0db98ed
Format code from tests
jofrevalles Sep 26, 2024
b7be952
Add two-qubit gate test
jofrevalles Sep 30, 2024
144a4ae
Change permutation of indices instead of array
jofrevalles Sep 30, 2024
cba0bb2
Format tests
jofrevalles Sep 30, 2024
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2 changes: 1 addition & 1 deletion ext/TenetYaoBlocksExt.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ function Tenet.Quantum(circuit::AbstractBlock)
map(occupied_locs(gate)) do l
from, to = last(wire[l]), Tenet.nextindex!(gen)
push!(wire[l], to)
(from, to)
(to, from)
end,
)

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32 changes: 32 additions & 0 deletions test/integration/YaoBlocks_test.jl
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Expand Up @@ -7,4 +7,36 @@

@test issetequal(sites(tn), [site"1", site"2", site"1'", site"2'"])
@test Tenet.ntensors(tn) == 2

@testset "GHZ Circuit" begin
circuit_GHZ = chain(n_qubits, put(1 => Yao.H), Yao.control(1, 2 => Yao.X), Yao.control(2, 3 => Yao.X))

quantum_circuit = Quantum(circuit_GHZ)

zeros = Quantum(Product(fill([1, 0], n_qubits))) #|000>
ones = Quantum(Product(fill([0, 1], n_qubits))) #|111>

expected_value = Tenet.contract(merge(zeros, quantum_circuit, ones')) # <111|circuit|000>
@test only(expected_value) ≈ 1 / √2

SV_Yao = apply!(zero_state(n_qubits), circuit_GHZ) # circuit|000>
@test only(statevec(ArrayReg(bit"111"))' * statevec(SV_Yao)) ≈ 1 / √2
end
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@testset "two-qubit gate" begin
U = matblock(rand(ComplexF64, 4, 4); tag="U")
circuit = chain(2, put((1, 2) => U))
psi = zero_state(2)
apply!(psi, circuit)

quantum_circuit = Quantum(circuit)
zeros = Quantum(Product(fill([1, 0], 2))) #|00>
ones = Quantum(Product(fill([0, 1], 2))) #|11>

expected_value = Tenet.contract(merge(zeros, quantum_circuit, ones')) # <11|circuit|00>

SV_Yao = apply!(zero_state(2), circuit) # circuit|00>

@test only(expected_value) ≈ only(statevec(ArrayReg(bit"11"))' * statevec(SV_Yao))
end
end
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