TIME ORDERING THEOREM AND CALCULATIONAL RECIPES FOR THERMOFIELD DYNAMICS

被引：20

作者：

CHU, H

UMEZAWA, H

机构：

[1] Institute of Theoretical Physics, University of Alberta, Edmonton

来源：

PHYSICS LETTERS A | 1993年 / 177卷 / 06期

关键词：

D O I：

10.1016/0375-9601(93)90963-Z

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that in thermo field dynamics (TFD), with a particular choice of the parameters, internal times cannot be larger than the largest external time for a Feynman diagram with any number of external points. We present a simple recipe which finally makes Feynman diagram calculations in TFD feasible. In fact, frequency integration becomes trivial compared to the Matsubara approach when the time property is utilized.

引用

页码：385 / 393

页数：9