Generalizations of the thermal Bogoliubov transformation

P. Elmfors and H. Umezawa

Physica A: Statistical Mechanics and its Applications, 1994, vol. 202, issue 3, 577-594

Abstract: The thermal Bogoliubov transformation in thermo field dynamics is generalized in two respects. First, a generalization of the α-degree of freedom to tilde non-conserving representations is considered. Secondly, the usual 2×2 Bogoliubov matrix is extended to a 4×4 matrix including mixing of modes with non-trivial multiparticle correlations. The analysis is carried out both for bosons and fermions.

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:202:y:1994:i:3:p:577-594

DOI: 10.1016/0378-4371(94)90480-4

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