Unital qubit channels admit operational time-reversal symmetry through Bayesian inverses precisely when the reference state allows a corresponding inverse for the equivalent Pauli channel.
Can a quantum state over time resemble a quantum state at a single time?
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Operational time-reversal symmetry for unital qubit channels
Unital qubit channels admit operational time-reversal symmetry through Bayesian inverses precisely when the reference state allows a corresponding inverse for the equivalent Pauli channel.