Self-consistent Conserving Theory for Quantum Impurity Systems: Renormalization Group Analysis

Details Self-consistent Conserving Theory for Quantum Impurity Systems: Renormalization Group Analysis Self-consistent Conserving Theory for Quantum Impurity Systems: Renormalization Group Analysis

2002-02-20

arxiv.org/abs/cond-mat/0202351v1

J. Low Temp. Phys. 126, 1233 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

17 pages, 7 figures, dedicated to Prof. Peter W\"olfle on the occasion of his 60th birthday

Scientific paper

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.

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