Open Quantum Systems, Entropy and Chaos

Details Open Quantum Systems, Entropy and Chaos Open Quantum Systems, Entropy and Chaos

1997-10-30

arxiv.org/abs/quant-ph/9710063v1

Physics

Quantum Physics

22 pages including 4 figures; LaTex uses epsf and sprocl.sty file. - Invited talk, 5th Rio de Janeiro International Workshop o

Scientific paper

Entropy generation in quantum sytems is tied to the existence of a nonclassical environment (heat bath or other) with which the system interacts. The continuous `measuring' of the open system by its environment induces decoherence of its wave function and entropy increase. Examples of nonrelativistic quantum Brownian motion and of interacting scalar fields illustrate these general concepts. It is shown that the Hartree-Fock approximation around the bare classical limit can lead to spurious semiquantum chaos, which may affect the determination of entropy production and thermalization also in other cases.

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