Thermal degree of freedom in thermo field dynamics

H. Umezawa, Y. Yamanaka

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The view of the thermal degree of freedom for the quantum field system, using the language of thermo field dynamics, is elaborated in this paper: the thermal degree of freedom is the degree of freedom to move through degenerate thermal vacua associated with spontaneous breakdown of a certain symmetry (Ĝ-symmetry). Based on this view, we study a quasi-particle picture, in which the Ĝ-transformation becomes the thermal Bogoliubov transformation.

Original languageEnglish
Pages (from-to)75-82
Number of pages8
JournalPhysics Letters A
Volume155
Issue number2-3
DOIs
Publication statusPublished - 1991 May 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Thermal degree of freedom in thermo field dynamics'. Together they form a unique fingerprint.

Cite this