Bosonization in the two-channel Kondo model

Details Bosonization in the two-channel Kondo model Bosonization in the two-channel Kondo model

1996-06-10

arxiv.org/abs/cond-mat/9606063v1

Physics

Condensed Matter

5 pages, latex (uses revtex and epsf macros) with 1 postscript figure

Scientific paper

10.1103/PhysRevB.55.5627

The bosonization of the $S=1/2$ anisotropic two-channel Kondo model is shown to yield two equivalent representations of the original problem. In a straight forward extension of the Emery-Kivelson approach, the interacting resonant level model previously derived by the Anderson-Yuval technique is obtained. In addition, however, a ``($\sigma$,$\tau$)'' description is also found. The strong coupling fixed point of the ($\sigma$,$\tau$) model was originally postulated to be related to the intermediate coupling fixed point of the two-channel Kondo model. The equivalence of the $\sigma$,$\tau$ model to the two-channel Kondo model is formally established. A summary of what one may learn from a simple study of these different representations is also given.

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