DIAGONALIZATION OF FULL FINITE TEMPERATURE GREEN-FUNCTIONS BY QUASI-PARTICLES

被引：15

作者：

HENNING, PA

UMEZAWA, H

机构：

[1] GSI DARMSTADT,W-6100 DARMSTADT,GERMANY

[2] UNIV ALBERTA,INST THEORET PHYS,EDMONTON T6G 2J1,ALBERTA,CANADA

来源：

PHYSICS LETTERS B | 1993年 / 303卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(93)91421-I

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

For thermal systems, standard perturbation theory breaks down because of the absence of stable, observable asymptotic states. We show, how the introduction of statistical quasi-particles (stable, but not observable) gives rise to a consistent description. Statistical and spectral information can be cleanly separated also for interacting systems.

引用

页码：209 / 214

页数：6

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