General Bound on the Rate of Decoherence

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General Bound on the Rate of Decoherence

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Title: General Bound on the Rate of Decoherence
Author: Rodriguez-Rosario, Cesar; Kimura, Gen; Imai, Hideki; Aspuru-Guzik, Alan

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Citation: Rodriguez-Rosario, Cesar A., Gen Kimura, Hideki Imai, and Alan Aspuru-Guzik. 2011. General bound on the rate of decoherence. Preprint, Dept. of Chemistry and Chemical Biology, Harvard University.
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Abstract: We establish the necessary and sufficient conditions for a quantum system to be stable under any general system-environment interaction. Quantum systems are stable when the time-derivative of their purity is zero. This stability provides a dynamical explanation of the classicality of measurement apparatus. We also propose a protocol to detect global quantum correlations using only local dynamical information. We show how quantum correlations to the environment provide bounds to the purity rate, which in turn can be used to estimate dissipation rates for general non-Markovian open quantum systems.
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