Quantum decoherence and classical correlations in open systems

Details Quantum decoherence and classical correlations in open systems Quantum decoherence and classical correlations in open systems

2007-12-14

arxiv.org/abs/0712.2427v1

Physics

Quantum Physics

11 pages, talk at the Workshop on Quantum-Classical Transition and Quantum Information, Benasque, Spain, 2006

Scientific paper

In the framework of the Lindblad theory for open quantum systems we determine the degree of quantum decoherence and classical correlations of a harmonic oscillator interacting with a thermal bath. The transition from quantum to classical behaviour of the considered system is analyzed and it is shown that the classicality takes place during a finite interval of time. We calculate also the decoherence time and show that it has the same scale as the time after which thermal fluctuations become comparable with quantum fluctuations.

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