Real-time Kadanoff-Baym approach to plasma oscillations in a correlated electron gas

被引：166

作者：

Kwong, NH ^{[1
]}

Bonitz, M ^{[1
]}

机构：

[1] Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.84.1768

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A nonequilibrium Green's functions approach to the collective response of correlated Coulomb systems at finite temperatures is presented. It is shown that solving Kadanoff-Baym-type equations of motion for the two-time correlation functions including the external perturbing field allows one to compute the plasmon spectrum with collision effects in a systematic and consistent way. The scheme has a "built-in" sum-rule preservation and is simpler to implement numerically than the equivalent equilibrium approach based on the Bethe-Salpeter equation.

引用

页码：1768 / 1771

页数：4

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