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Decoherence time in self-induced decoherence

Mario Castagnino·Olimpia Lombardi
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Abstract

A general method for obtaining the decoherence time in self-induced decoherence is presented. In particular, it is shown that such a time can be computed from the poles of the resolvent or of the initial conditions in the complex extension of the Hamiltonian's spectrum. Several decoherence times are estimated: $10^{-13}-$ $10^{-15}s$ for microscopic systems, and $10^{-37}-10^{-39}s$ for macroscopic bodies. For the particular case of a thermal bath, our results agree with those obtained by the einselection (environment-induced decoherence) approach.

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Mario Castagnino, Olimpia Lombardi. 2005-02-14. Decoherence time in self-induced decoherence. https://doi.org/10.1103/physreva.72.012102

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