Linear response in non-equilibrium thermo field dynamics

K. Nakamura*, Y. Yamanaka, H. Umezawa

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

The linear response theory is discussed in the context of non-equilibrium thermo field dynamics which has been developed in recent years and can deal with a quantum field system in time-dependent non-equilibrium situations. An example of a simple model is given to illustrate the present formalism. Emphasis is put on the fact that in non-equilibrium thermo field dynamics the change of a thermal situation due to an external source should appear through the thermal Bogoliubov transformation, creating a new contribution to the linear response formula. It is also found that the dissipativity naturally comes out in the conventional retarded correlation.

本文言語English
ページ(範囲)29-50
ページ数22
ジャーナルPhysica A: Statistical Mechanics and its Applications
152
1-2
DOI
出版ステータスPublished - 1988 9月
外部発表はい

ASJC Scopus subject areas

  • 統計学および確率
  • 凝縮系物理学

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