Fidelity preserving maps on density operators
classification
🧮 math.OA
math-phmath.MPquant-ph
keywords
densityfidelityhilbertoperatorspreservingspaceantiunitarybijective
read the original abstract
We prove that any bijective fidelity preserving transformation on the set of all density operators on a Hilbert space is implemented by an either unitary or antiunitary operator on the underlying Hilbert space.
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