Phase space dynamics of overdamped quantum systems

Details Phase space dynamics of overdamped quantum systems Phase space dynamics of overdamped quantum systems

2002-11-18

arxiv.org/abs/cond-mat/0211367v1

Europhys. Lett. 61, 301 (2003)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 2 figures, to appear in Euro. Phys. Lett

Scientific paper

10.1209/epl/i2003-00323-8

The phase space dynamics of dissipative quantum systems in strongly condensed phase is considered. Based on the exact path integral approach it is shown that the Wigner transform of the reduced density matrix obeys a time evolution equation of Fokker-Planck type valid from high down to very low temperatures. The effect of quantum fluctuations is discussed and the accuracy of these findings is tested against exact data for a harmonic system.

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