Add testing helper for consistent channel/mixture #5247
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Related: #4365 |
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| def assert_consistent_channel(gate: Any, rtol: float = 1e-5, atol: float = 1e-8): | ||
| assert cirq.has_kraus(gate), f"Given gate {gate!r} does not return True cirq.has_kraus." | ||
| kraus_ops = cirq.kraus(gate) | ||
| assert cirq.is_cptp(kraus_ops=kraus_ops, rtol=rtol, atol=atol), ( | ||
| f"Kraus operators for {gate!r} did not sum to identity up to expected tolerances. " | ||
| f"Summed to {sum(m.T.conj() @ m for m in kraus_ops)}" | ||
| ) |
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Please also add tests for has_mixture and mixture.
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Adds a helper that tests that channel kraus operator is cptp (\sum_i A_i^\dagger A_i = I) and that has_kraus is true. Uses this on channels. Adds a helper for testing that mixture's probabilities sum to 1. Uses this on mixtures. Fixes quantumlib#2271
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Adds a helper that tests that channel kraus operator is cptp (\sum_i A_i^\dagger A_i = I) and that has_kraus is true. Uses this on channels. Adds a helper for testing that mixture's probabilities sum to 1. Uses this on mixtures. Fixes quantumlib#2271
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Adds a helper that tests that channel kraus operator is cptp (\sum_i A_i^\dagger A_i = I) and that has_kraus is true. Uses this on channels.
Adds a helper for testing that mixture's probabilities sum to 1. Uses this on mixtures.
Fixes #2271