THERMODYNAMIC POTENTIAL IN REAL-TIME FORMALISMS OF THERMAL FIELD-THEORY

Authors
XU HH
Citation
Hh. Xu, THERMODYNAMIC POTENTIAL IN REAL-TIME FORMALISMS OF THERMAL FIELD-THEORY, Communications in Theoretical Physics, 25(4), 1996, pp. 443-446
Citations number
15
Categorie Soggetti
Physics
Journal title
Communications in Theoretical Physics → ACNP
ISSN journal
02536102
Volume
25
Issue
4
Year of publication
1996
Pages
443 - 446
Database
ISI
SICI code
0253-6102(1996)25:4<443:TPIRFO>2.0.ZU;2-F
Abstract
A full expression for the thermodynamic potential of a given system is derived by the closed-time path approach. It is found with the aid of the residue theorem that this real-form thermodynamic potential coinc ides with corresponding imaginary one in the Matsubara formalism. Ther modynamic potential in thermo field dynamics specified by a time-path parameter sigma, 0 < sigma less than or equal to beta, is also derived and briefly discussed.