Self-consistent renormalisation in thermofield dynamics

H. Umezawa*, Y. Yamanaka

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


From the consideration of quasiparticles in thermal situations, the authors derive a universal expression of the self-consistent renormalisation condition in thermofield dynamics. This condition is valid even when the renormalised energy becomes time dependent, and provides us with four independent self-consistent equations for four real parameters, i.e. renormalised energy, dissipative coefficient, number density and a new degree of freedom chi , which is a phase in thermal doublet space.

Original languageEnglish
Article number039
Pages (from-to)2461-2473
Number of pages13
JournalJournal of Physics A: General Physics
Issue number13
Publication statusPublished - 1989 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Physics and Astronomy(all)
  • Mathematical Physics


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