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Toulouse limit for the overscreened four-channel Kondo problem

M. Fabrizio·Alexander O. Gogolin
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Abstract

We show that the spin dynamics of the 4--channel Kondo model is equivalent to the one of a model with a spin 1/2 impurity coupled to spin 1 conduction electrons. By abelian bosonization of the latter model we find a kind of Toulouse limit analogous to that recently discussed by Emery and Kivelson for the 2--channel case. We analyse the model by exploiting the close analogy to the problem of an impurity in the Luttinger liquid.

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M. Fabrizio, Alexander O. Gogolin. 1994-07-26. Toulouse limit for the overscreened four-channel Kondo problem. https://doi.org/10.1103/physrevb.50.17732

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