Release 0.28.0

[natestemen]

Summary

Quantum Subspace Expansion

With the main functionaly implemented, quantum subspace expansion is now available in Mitiq! The technique requires a sequence of check operators, a Hamiltonian, and an observable in addition to the typical circuit and executor that Mitiq needs to operate.

from mitiq.qse import execute_with_qse

execute_with_qse(circuit, executor, check_operators, code_hamiltonian, observable)

This feature is still in flux, and would greatly benefit from further testing. Do give a try, and let us know if you have feedback! More details can be found in our API-doc. Congratulations to @bubakazouba for the great work here.

PEC Calibration

Last release we added support to run PEC experiments within the calibration module. This release we made two improvements:

1. Calibration experiments now represent all two-qubit gates by default (previously this was just $\mathrm{C}X$ and $\mathrm{C}Z$ gates.)
2. When running calibrator.run(log=True) you will now find results from your PEC pretty-printed alongside any ZNE experiments.

Installation

Our core dependencies (NumPy, Cirq, SciPy) are now less tightly specified which means easier installs for users!

Robust Shadow Estimation

@Min-Li has been hard at work bringing shadows to Mitiq. The shadows module is not quite ready for use, but you can get a sneak peak of what's to come in the Classical Shadows section of our API-doc.

All changes

• Fix docstring in qse.py (More fixes to docstring in qse.py #1944) [@Misty-W]
• Add QSE to API-doc (Add QSE to API-doc #1938) [@natestemen]
• fix asv benchmarks (fix asv benchmarks #1937) [@natestemen]
• [Classical Shadows 1] classical postprocessing ([Classical Shadows 1] classical postprocessing #1908) [@Min-Li]
• Add Calibration logging for PEC (Add Calibration logging for PEC #1873) [@Misty-W]
• [Classical Shadows 1] utils for shadows and unit test ([Classical Shadows 1] utils for shadows and unit test #1907) [@Min-Li]
• Clean up types (Clean up types #1825) [@natestemen]
• Relax test condition for test_execute_with_pauli_twirling (Temporary fix for intermittent failures of test_execute_with_pauli_twirling #1931) [@Misty-W]
• loosen remaining core dependency versions (loosen remaining core dependency versions #1917) [@natestemen]
• [Classical Shadows] quantum processing and test ([Classical Shadows] quantum processing and test #1906) [@Min-Li]
• Make PEC calibration support all multi-qubit-gate (Make PEC calibration support all multi-qubit-gate #1881) [@YuNariai]
• Implements high-level functions for QSE (Implements high-level functions for QSE #1902) [@bubakazouba]
• Temporary fix for documentation problem (Temporary fix for documentation problem #1927) [@andreamari]
• Adding layerwise folding as tutorial to mitiq. (Adding layerwise folding as tutorial to mitiq. #1894) [@vprusso]
• Fix docstring of initialized_depolarized_noise (Fix docstring of initialized_depolarized_noise #1919) [@andreamari]
• Update broken URLs (Update broken URLs #1912) [@Min-Li]
• indicate under active development on master (Set master in dev mode #1900) [@natestemen]

Dependency updates

• Update pennylane requirement from ~=0.30.0 to ~=0.31.0 (Update pennylane requirement from ~=0.30.0 to ~=0.31.0 #1888) [@dependabot]
• Update cirq requirement from ~=1.1.0 to ~=1.2.0 (Update cirq requirement from ~=1.1.0 to ~=1.2.0 #1922) [@dependabot]
• Update qiskit requirement from ~=0.43.3 to ~=0.44.0 (Update qiskit requirement from ~=0.43.3 to ~=0.44.0 #1935) [@dependabot]
• Update amazon-braket-sdk requirement from ~=1.51.0 to ~=1.52.0 (Update amazon-braket-sdk requirement from ~=1.51.0 to ~=1.52.0 #1933) [@dependabot]
• Update qiskit-ibm-provider requirement from ~=0.6.1 to ~=0.6.2 (Update qiskit-ibm-provider requirement from ~=0.6.1 to ~=0.6.2 #1932) [@dependabot]
• Update amazon-braket-sdk requirement from ~=1.50.0 to ~=1.51.0 (Update amazon-braket-sdk requirement from ~=1.50.0 to ~=1.51.0 #1928) [@dependabot]
• Update qiskit requirement from ~=0.43.2 to ~=0.43.3 (Update qiskit requirement from ~=0.43.2 to ~=0.43.3 #1925) [@dependabot]
• Update amazon-braket-sdk requirement from ~=1.49.1 to ~=1.50.0 (Update amazon-braket-sdk requirement from ~=1.49.1 to ~=1.50.0 #1926) [@dependabot]
• Update amazon-braket-sdk requirement from ~=1.49.0 to ~=1.49.1 (Update amazon-braket-sdk requirement from ~=1.49.0 to ~=1.49.1 #1916) [@dependabot]
• Update amazon-braket-sdk requirement from ~=1.46.0 to ~=1.49.0 (Update amazon-braket-sdk requirement from ~=1.46.0 to ~=1.49.0 #1915) [@dependabot]

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This discussion was created from the release v0.28.0.

[Misty-W]

Closed now that v0.29.0 is released.