Citation
P. Elmfors et H. Umezawa, GENERALIZATIONS OF THE THERMAL BOGOLIUBOV TRANSFORMATION, Physica. A, 202(3-4), 1994, pp. 577-594
Citations number
22
Categorie Soggetti
Physics
Journal title
ISSN journal
03784371
Volume
202
Issue
3-4
Year of publication
1994
Pages
577 - 594
Database
ISI
SICI code
0378-4371(1994)202:3-4<577:GOTTBT>2.0.ZU;2-X
Abstract
The thermal Bogoliubov transformation in thermo field dynamics is gene
ralized in two respects. First, a generalization of the alpha-degree o
f freedom to tilde non-conserving representations is considered. Secon
dly, the usual 2 x 2 Bogoliubov matrix is extended to a 4 x 4 matrix i
ncluding mixing of modes with non-trivial multiparticle correlations.
The analysis is carried out both for bosons and fermions.