Coulomb screening in the two-time Keldysh-Green-function formalism

被引：20

作者：

Gartner, P ^{[1
]}

Bányai, L ^{[1
]}

Haug, H ^{[1
]}

机构：

[1] Univ Frankfurt, Inst Theoret Phys, D-6000 Frankfurt, Germany

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.62.7116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The correct formation of the two-time self-consistent Coulomb quantum kinetics with screening requires a polarization loop obeying the Ward identity stemming from the charge conservation. Otherwise an infrared divergence occurs. For a self-consistent self-energy without vertex part, a polarization loop which includes a vertex part calculated in the ladder approximation, is shown to satisfy the required Ward identity.

引用

页码：7116 / 7120

页数：5

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