A game of surface codes demo

[Qottmann]

P0 Game of Surface Codes Demo 2025 Q2 [sc-87600]

open question:

• do I understand it correct that single X and Z measurements are free, but joint measurements cost 1 🕒? >> yes
• What does it mean that the error probability of the distillation of 15 faulty magic states with $p$ leads to a faulty magic state with probability $35p^3$, yet, the probability of failure is $(1-p)^n$? 🤔 >> p is the infidelity of the state, and $35p^3$ is the infidelity of the distilled state. The success chance of not having an error is $(1-p)^n$

[github-actions]

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[github-actions]

Thank you for opening this pull request.

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Deployment Info:

• Pull Request ID: 1355
• Deployment SHA: 0ec01c5c01abf64a35b7190f2328a0db400202db
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[dime10]

Nice demo! 🤩

Nothing much to say except minor editing and a few questions/suggestions.

[rashidnhm]

Reverted the base back. It's important that the base branch remains as dev as that affects how CI behaves

[dime10]

Approved :) (from the technical side)

[dime10]

I'm pretty sure Catalyst supports Numpy 2, it just can't be 2.0.0. Is that related to jaxlib though?

Suggested change

	# TODO: Remove this on next release. Currently Catalyst 0.11 pins jaxlib to 0.4.8;\
	$$PYTHON_VENV_PATH/bin/python -m pip install 'numpy<2';\
	# TODO: Remove this on next release. Currently Catalyst 0.11 pins jaxlib to 0.4.28;\
	$$PYTHON_VENV_PATH/bin/python -m pip install 'numpy<2';\

[rashidnhm]

Hey @dime10 , it's moreof a pip issue than Catalyst.

When it upgrades jax pip also upgrades all pre-installed packages to their latest version.

I think a better TODO would be

# TODO: Remove this on next release once QML is upgraded to JAX > 0.4.28

[dime10]

Are you saying the qml repo currently doesn't work numpy 2 then?