The beta function of the multichannel Kondo model
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The beta function of the multichannel Kondo model is calculated exactly in the limit of large spin N and channel number M=gamma*N, with constant gamma. There are no corrections in any finite order of 1/N. One zero is found at a finite coupling strength, showing directly the Non--Fermi liquid behavior of the model. This renormalization group flow allows to introduce a variational principle for the entropy, to obtain the low temperature thermodynamics. Such in particular the low temperature thermodynamics of the non--crossing approximation to the Kondo model becomes accessible.
Cite
@article{arxiv.cond-mat/9811243,
title = {The beta function of the multichannel Kondo model},
author = {Kurt Fischer},
journal= {arXiv preprint arXiv:cond-mat/9811243},
year = {2009}
}
Comments
4 pages