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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:
Use the effect's _trace_distance_bound_
method.
Strategy 2:
If the effect is unitary, calculate the trace distance bound from the eigenvalues of the unitary matrix.
Args | |
---|---|
val
|
The effect of which the bound should be calculated |
Returns | |
---|---|
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 |