✨ Sorting designed SiDB gates

[wlambooy]

Description

This PR introduces an extension to is_operational and design_sidb_gates. The former is now able to return the simulation results that certify the status OPERATIONAL, which may then be used by the extension to the latter, which uses the simulation results to return the designed layouts in a specific ordering. This PR implements a simple heuristic for this ordering, namely it prefers the layouts for the the ground state isolation is large, ie., the energetic gap between the ground state and the first excited state. Specifically, it sorts by the minimum ground state isolation for each input.

To use this new feature when designing SiDB gates, make sure that all combinations are enumerated, and set the post_design_process parameter to PREFER_ENERGETICALLY_ISOLATED_GROUND_STATES.

Checklist:

• The pull request only contains commits that are related to it.
• I have added appropriate tests and documentation.
• I have added a changelog entry.
• I have created/adjusted the Python bindings for any new or updated functionality.
• I have made sure that all CI jobs on GitHub pass.
• The pull request introduces no new warnings and follows the project's style guidelines.

[github-actions]

clang-tidy made some suggestions

[github-actions]

clang-tidy made some suggestions

[github-actions]

clang-tidy made some suggestions

[github-actions]

clang-tidy made some suggestions

[marcelwa]

@wlambooy is this PR still under active development, or can it be closed?

[wlambooy]

@wlambooy is this PR still under active development, or can it be closed?

I actually started merging it with main yesterday (big task in this case). It is a good starting point for the advanced circuit design I'm getting into. I'll let you know if this PR will stay or if it will be part of a different one.

[github-actions]

clang-tidy made some suggestions

[Drewniok]

Hi @wlambooy,

Many thanks for your hard work! Before I give you detailed feedback, could you, as we have discussed, extend the benchmark with gate design and operational domain? It will be super helpful in the future, especially for changes like this one. Many thanks!

[wlambooy]

I see now that I misread your comment; I added a specific benchmark for is_operational instead of operational_domain. Thinking about it, I think it might not be so interesting to put a grid-search operational domain benchmark if there is already one for is_operational in place, since BENCHMARK calls is_operational then 100 times, while grid-search operational domain also doesn't do so much more than calling is_operational some number of times.

For design_sidb_gates, I chose to benchmark the QuickCell algorithm, such that we can compare future improved versions of it. This benchmark does a lot more over is_operational than operational domain grid-search, since at the moment we also write all possible canvas layouts to a vector, which we may improve in the future.

Let me know if you think this is good :).

[Drewniok]

I see now that I misread your comment; I added a specific benchmark for is_operational instead of operational_domain. Thinking about it, I think it might not be so interesting to put a grid-search operational domain benchmark if there is already one for is_operational in place, since BENCHMARK calls is_operational then 100 times, while grid-search operational domain also doesn't do so much more than calling is_operational some number of times.

For design_sidb_gates, I chose to benchmark the QuickCell algorithm, such that we can compare future improved versions of it. This benchmark does a lot more over is_operational than operational domain grid-search, since at the moment we also write all possible canvas layouts to a vector, which we may improve in the future.

Let me know if you think this is good :).

That's great! Thank you!

[Drewniok]

@wlambooy would it be possible to also test the different options for strategy_to_analyze_operational_status? Many thanks! 🙏