Retrodiction with Two-Level Atoms: Atomic Previvals and Micromaser Field Measurements
Quantum retrodiction is quantum mechanics based on measurement results. If the state prepared by a preparaton device is not completely certain then the retrodictive state, which is the state measured by a detector, can give information about the state at earlier times. If it is used to calculate a set of retrodictive conditional probabilities, then these must be related to the predictive probabilities by Bayes’ Theorem .
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