Implicit ladder summation in the Hartree-Fock-Bogoliubov approach

被引：5
|
作者：
Pricoupenko, Ludovic [1 ,2 ]
机构：
[1] Univ Paris 06, Lab Phys Theor Matiere Condensee, F-75252 Paris, France
[2] CNRS, F-75252 Paris, France
来源：
PHYSICAL REVIEW A | 2011年 / 84卷 / 05期
关键词：
GAS;
D O I：
10.1103/PhysRevA.84.053602
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The fully variational Hartree-Fock-Bogoliubov approach for bosons is studied in the limit of zero-range forces in two and three dimensions. The equation of state obtained in two dimensions is expressed in a parametric form. It is shown that the Lambda potential permits to perform an implicit summation of the ladder diagrams without leaving the variational scheme, restoring thus the consistency of this approximation.
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页数：8
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