v0.42.0

(Full Changelog)

Highlights

🎊 Thanks for a great 2024! Our end of the year recap should be out soon. Subscribe here to get the newsletter in your mailbox.

🚀 Many thanks to first time contributors @gluonhiggs, @JMuff22, @sanketsharma and @Shivansh20128!

• @gluonhiggs added support for some additional Qiskit gates through using gate decomposition for gates that are unavailable
  in Cirq. A similar idea was applied to gates not recognized by QASM.
• @Shivansh20128 added a new page in the documentation for benchmarking circuits.
• @JMuff22 and @sanketsharma corrected typos in the documentation.

💡 A new error-mitigation technique is on its way. Thanks to @Misty-W for the Probabilistic Error Amplification RFC!

🎏 Modular functions are now available for both PEC and DDD, courtesy of @natestemen and @bdg221! These functions allow a user to generate intermediary circuits and combine the results in a two step process. E.g. in PEC:

from mitiq import pec

circuits = pec.intermediary_sampled_circuits(circuit, representations)

sampled_circuit_results = ...  # execute the circuits on a simulator/hardware/toothbrush/etc

pec_estimate = pec.combine_results(sampled_circuit_results, ...)

✨ Enhancements

• Fix converting Rxx and similar Qiskit gates (#2579) [@gluonhiggs]
• Handle unsupported gates (#2585) [@gluonhiggs]
• RFC for Probabilistic Error Amplification technique (#2550) [@Misty-W]
• Address executor and observable incompatibility (#2514) [@bdg221]
• Modularize PEC functionality (#2604) [@natestemen]
• Modularize DDD functionality (#2610) [@bdg221]

🧑🏽‍💻 Developer Improvements

• Fix flaky ZNE factory + observable test (#2602) [@natestemen]
• Ensure further LRE compatibility with non-Cirq circuits (#2599) [@natestemen]
• Throw Erorr on Multiple Measurements per Qubit with Observables (#2593) [@bdg221]

📓 Documentation

• Update Calibration run docstring for API-doc (#2516) [@bdg221]
• Add benchmarking circuits to user guide (#2566) [@Shivansh20128]
• Correct run-on sentences in the API-doc for CDR function docstrings (#2589) [@Shivansh20128]
• Quick fix: Fix typo and headings in classical shadows tutorial (#2574) [@JMuff22]
• Update executor and observable docs (#2594) [@bdg221]
• Add log param to calibration guide (#2568) [@bdg221]
• Fix constant value in ZNE docs (#2591) [@cosenal]
• Fixed typo in documentation (##2611) [@sanketsharma]

📦 Dependency Updates

• Update qiskit requirement from ~=1.2.4 to ~=1.3.1 (#2603) [@dependabot, @cosenal]
• Update qibo requirement from ~=0.2.7 to ~=0.2.13 (#2559) [@dependabot]
• Bump pyqrack from 1.32.21 to 1.32.27 (#2582) [@dependabot, @natestemen]
• Bump codecov/codecov-action from 4 to 5 (#2576) [@dependabot]
• Bump pyqrack from 1.32.11 to 1.32.21 (#2580) [@dependabot]