A Compact Approximate Solution to the Friedel-Anderson Impuriy Problem
介观与纳米尺度物理
2009-11-11 v1
摘要
An approximate groundstate of the Anderson-Friedel impurity problem is presented in a very compact form. It requires solely the optimization of two localized electron states and consists of four Slater states (Slater determinants). The resulting singlet ground state energy lies far below the Anderson mean field solution and agrees well with the numerical results by Gunnarsson and Schoenhammer, who used an extensive 1/N_{f}-expansion for a spin 1/2 impurity with double occupancy of the impurity level. PACS: 85.20.Hr, 72.15.Rn
引用
@article{arxiv.cond-mat/0602196,
title = {A Compact Approximate Solution to the Friedel-Anderson Impuriy Problem},
author = {Gerd Bergmann},
journal= {arXiv preprint arXiv:cond-mat/0602196},
year = {2009}
}