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Quantum distribution function of a nonequilibrium system

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  • Sogo, Kiyoshi
  • Fujimoto, Yasushi

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.

Suggested Citation

  • Sogo, Kiyoshi & Fujimoto, Yasushi, 1990. "Quantum distribution function of a nonequilibrium system," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(2), pages 820-832.
    • Handle: RePEc:eee:phsmap:v:168:y:1990:i:2:p:820-832
    DOI: 10.1016/0378-4371(90)90032-N
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