Simple description of the anisotropic two-channel Kondo problem
P. Coleman, A. J. Schofield
Abstract
We adapt strong-coupling methods first used in the one-channel Kondo model to develop a simple description of the spin-1 2 two-channel Kondo model with channel anisotropy. Our method exploits spin-charge decoupling to develop a compactified Hamiltonian that describes the spin excitations. The structure of the fixed-point Hamiltonian and quasiparticle impurity S-matrix are incompatible with a Fermi liquid description.
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