THE GENERATING FUNCTIONAL FOR INITIAL CORRELATIONS IN PERTURBATION-THEORY OF NONEQUILIBRIUM STATES

被引：8

作者：

HENNING, PA ^{[1
]}

机构：

[1] GESELL SCHWERIONENFORSCH GMBH,W-6100 DARMSTADT,GERMANY

来源：

PHYSICS LETTERS A | 1990年 / 145卷 / 6-7期

关键词：

D O I：

10.1016/0375-9601(90)90943-I

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Within the perturbation theory of quantum fields in non-equilibrium states, initial correlations play a role in the form of additional vertices. They are related to expectation values of normal ordered operator products. In this paper, they are expressed in terms of Wightman functions, and a particularly simple result for their generating functional is obtained. It turns out to be very useful in classifying those quantum states, that do not require the introduction of these additional vertices. © 1990.

引用

页码：329 / 332

页数：4