A single round of an N-level coherent-state POVM removes all quasiprobability negativity, and the equivalent depolarizing dynamics loses negativity abruptly at a critical time that can be shorter than the conventional decoherence time.
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Quantum-to-Classical Transition via Single-Shot Generalized Measurements
A single round of an N-level coherent-state POVM removes all quasiprobability negativity, and the equivalent depolarizing dynamics loses negativity abruptly at a critical time that can be shorter than the conventional decoherence time.