Equation of motion approach to the solution of Anderson model
Strongly Correlated Electrons
2009-10-31 v1
Abstract
Based on an equation of motion approach the single impurity Anderson model(SIAM) is reexamined. Using the cluster expansions the equations of motion of Green functions are transformed into the corresponding equations of motion of connected Green functions, which provides a natural and uniform truncation scheme. A factor of two missing in the Lacroix's approximation for the Kondo temperature is gained in the next higher order truncation beyond Lacroix's. A quantitative improvement in the density of states at the Fermi level is also obtained.
Cite
@article{arxiv.cond-mat/9902199,
title = {Equation of motion approach to the solution of Anderson model},
author = {Hong-Gang Luo and Zu-Jian Ying and Shun-Jin Wang},
journal= {arXiv preprint arXiv:cond-mat/9902199},
year = {2009}
}
Comments
4 pages, 2 figures