Effective potential for dissipative quantum systems

Details Effective potential for dissipative quantum systems Effective potential for dissipative quantum systems

1998-11-25

arxiv.org/abs/cond-mat/9811357v1

in "Path Integrals from peV to TeV - 50 Years from Feynman's paper", eds. R.Casalbuoni et al. (World Scientific, Singapore, 19

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 postscript figures (embedded by psfig)

Scientific paper

We consider quantum nonlinear systems with dissipation described within the Caldeira-Leggett model, i.e., by a nonlocal action in the path integral for the density matrix. Approximate classical-like formulas are derived in order to evaluate thermal averages of observables: the cases of linear and nonlinear dissipation are considered, and the framework is extended to the case of many degrees of freedom.

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