Returns a maximum on the trace distance between this effect's input
cirq.trace_distance_bound(
val: Any
) -> float
and output.
This method attempts a number of strategies to calculate this value.
Strategy 1 |
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Use the effect's _trace_distance_bound_ method.
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Strategy 2 |
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If the effect is unitary, calculate the trace distance bound from the
eigenvalues of the unitary matrix.
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Args |
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val
|
The effect of which the bound should be calculated
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Returns |
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If any of the strategies return a result that is not Notimplemented and
not None, that result is returned. Otherwise, 1.0 is returned.
Result is capped at a maximum of 1.0, even if the underlying function
produces a result greater than 1.0
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