Quantum distribution function of a nonequilibrium system

Kiyoshi Sogo and Yasushi Fujimoto

Physica A: Statistical Mechanics and its Applications, 1990, vol. 168, issue 2, 820-832

Abstract: A path integral representation is derived for the Wigner distribution function of a nonequilibrium system coupled with a heat bath. Under appropriate conditions, the Wigner distribution function approaches an equilibrium distribution, which manifests shifting and broadening of spectral lines due to the interaction with the heat bath. It is shown that the equilibrium distribution becomes the quantum canonical distribution in the limit of vanishing coupling constant.

Date: 1990
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:168:y:1990:i:2:p:820-832

DOI: 10.1016/0378-4371(90)90032-N

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