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物理学报  2011 

Classical behaviour of various variables in an open Bose-Hubbard system

Keywords: quantum trajectories,decoherence,classical limit

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Abstract:

Quantum dispersions of various sets of dynamical variables of an open Bose-Hubbard system in a classical limit are studied. To this end, an open system is described in terms of stochastic evolution of its quantum pure states. It is shown that the class of variables that display classical behaviour crucially depends on the type of noise. This is relevant in the mean-field approximation of open Bose-Hubbard dynamics.

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