Toulouse limit for the overscreened four-channel Kondo problem

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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References in corpus (4)

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• A Simple Formula for the Persistent Current in Disordered 1D Rings: Parity and Interaction Effects
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