Improve CHSH score of Rigetti Aspen-M-3

[bernardyeszero]

Bounty type: code implementation

Language requirements: Any programming language and documentation needs English.

Applicant requirements: From an academic background in quantum physics or computer science.

How to complete the bounty task:

1. Please read the README.md in this repo for the CHSH game definition and example circuits.
2. Try to improve the CHSH score of Regetti Aspen-M-3 from two aspects:
   • identify the instability problem as stated in the problem section of README.md.
   • increase the CHSH score with raw data. Readout error mitigation is not applicable, because the correction matrix is applied to the probability, not single-shot data. Other possible ways include pulse-level programming (e.g. dynamical decoupling and actively resetting qubits for the next shot) and manual allocation to two specific qubits for DI-QRNG.

References:

1. README.md in this repo
2. Manuals from AWS Braket service: https://amazon-braket-sdk-python.readthedocs.io/en/stable/

[zhangjiannan]

@AbdullahKazi500 assigned, you can start working on it now. Please make sure to submit PR before hackathon ddl, good to submit a few days before the ddl so that we have enough time to review it.