Self-consistent Conserving Theory for Quantum Impurity Systems: Renormalization Group Analysis
Strongly Correlated Electrons
2007-05-23 v1 Mesoscale and Nanoscale Physics
Abstract
We review the diagrammatic, conserving theory for quantum impurities with strong on-site repulsion. The method is based on auxiliary particle technique, where Wick's theorem is valid, which opens up the possibility for generalizations to more complicated situations. An analysis in terms of the perturbative renormalization group (RG) shows that on the level of the Conserving T--matrix Approximation the theory correctly describes the RG flow, including the non-scaling of potential scattering terms and the correct Kondo temperature.
Cite
@article{arxiv.cond-mat/0202351,
title = {Self-consistent Conserving Theory for Quantum Impurity Systems: Renormalization Group Analysis},
author = {Stefan Kirchner and Johann Kroha},
journal= {arXiv preprint arXiv:cond-mat/0202351},
year = {2007}
}
Comments
17 pages, 7 figures, dedicated to Prof. Peter W\"olfle on the occasion of his 60th birthday