TensorFlow Quantum 0.6.0

New Features / Improvements

tfq.math now contains high performance fixed bond dimension MPS simulation to sample, compute expectation values and compute expectation values via sampling from 1D non periodic circuits.
tfq.math.mps_1d_expectation
tfq.math.mps_1d_sample
tfq.math.mps_1d_sampled_expectation
These are fully parallelized and based on new qsim MPS functionality found here: https://github.com/quantumlib/qsim/blob/d063d427d1f55d580416259233ce9c64037c00a0/lib/mps_simulator.h#L1

Instances of cirq.LineQubit are now supported when serializing circuits and paulisum objects.

tfq.optimizers now contains an implementation of SPSA optimization: https://www.jhuapl.edu/spsa/
tfq.optimizers.spsa_minimize.

Other

Minor CPU performance boosts from qsim upgrades.
TFQ now relies on TensorFlow version 2.7.0.
New tutorials that can be found on website.

Full commit list:

• Bump working version to 0.6.0 by @MichaelBroughton in #570
• Remove -q flag from pip install in notebooks. by @MichaelBroughton in #575
• Quantum reinforcement learning tutorial by @sjerbi in #541
• Removed fixed grpcio version. by @MichaelBroughton in #584
• Cleaned up latex and docs rendering. by @MichaelBroughton in #585
• Added new noise tutorial. by @MichaelBroughton in #582
• Upgraded sympy to v1.8. by @MichaelBroughton in #591
• Updated tensorflow.org/quantum landing cards. by @MichaelBroughton in #593
• Pulled out Cirq proto dependency. by @MichaelBroughton in #590
• Ensure gradient of tf.math.fidelity remains float32 when autographed. by @MichaelBroughton in #596
• Fix internal build error by @jaeyoo in #600
• Upgrade to TF2.5.1 by @jaeyoo in #612
• Upgrade CI to 18.04 to follow TF 2.5.0 by @MichaelBroughton in #613
• Update concepts.md by @MichaelBroughton in #626
• Update design.md by @MichaelBroughton in #627
• importlib.reload(pkg_resources) for tensorflow.org by @MarkDaoust in #631
• Fix QRL tutorial by @sjerbi in #634
• Add cirq.LineQubit support to op_deserializer.py. by @MichaelBroughton in #633
• Add support for cirq.LineQubit to op_serializer.py by @MichaelBroughton in #632
• Increment requirement to Cirq to 0.13.1 by @tonybruguier in #621
• Add support for LineQubit to serializer.py by @MichaelBroughton in #637
• Fix auditwheel script by @jaeyoo in #639
• Finish support for LineQubit everywhere. by @MichaelBroughton in #641
• Implement serialization logic for ProjectorSums. by @tonybruguier in #623
• Run format_all script by @tonybruguier in #644
• change import to cirq_google from cirq.google by @tonybruguier in #643
• Upgrade to TF 2.7.0. by @MichaelBroughton in #650
• Add tfq.math.mps_1d_expectation for 1D MPS by @jaeyoo in #610
• update qsim to latest version. by @MichaelBroughton in #651
• Add mps 1d Sample / SampledExpectation ops by @jaeyoo in #654
• Add SPSA optimizer by @lockwo in #653
• Update MPS docs by @MichaelBroughton in #657
• Loosen cirq requirements in anticipation of release. by @MichaelBroughton in #659
• constrain xticks in two plt figures by @tbcdebug in #658

New Contributors

• @sjerbi made their first contribution in #541
• @tbcdebug made their first contribution in #658

Full Changelog: v0.5.0...v0.6.0