Functional Approach to Quantum Decoherence and the Classical Final Limit

Abstract

For a wide set of quantum systems it is demonstrated that the quantum regime can be considered as the transient phase while the final classical statistical regime is a permanent state. A basis where exact matrix decoherence appears for these final states is found. The relation with the decoherence of histories formalism is studied. A set of final intrinsically consistent histories is found.

20 pages. Phys. Rev A in press 2000

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