The Luttinger-Ward method applied to the 2D Coulomb gas

被引：2

作者：

Agnihotri, M. P. ^{[1
]}

Apel, W. ^{[1
]}

Weller, W. ^{[2
]}

机构：

[1] Phys Tech Bundesanstalt, D-38116 Braunschweig, Germany

[2] Univ Leipzig, Inst Theoret Phys, D-04103 Leipzig, Germany

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2008年 / 245卷 / 02期

关键词：

D O I：

10.1002/pssb.200743311

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We review the Luttinger-Ward method and show how one can combine it with the thory of Baym and Kadanoff in order to get conserving approximations in many-body perturbation theory. We solve the variation procedure numerically using an ansatz for the selfenergy in the case of the two-dimensional Coulomb problem. Comparison with results of the traditional iteration of the selfconsistency equation yields satisfactory agreement for parameters where the iteration converges. The extremalization of the Luttinger-Ward functional works beyond that point.

引用

页码：421 / 427

页数：7

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