Majorana fermion formulation of the two channel Kondo model
Abstract
We show that a Majorana fermion description of the two channel Kondo model can emerge quite naturally as a representation of the algebra associated with the spin currents in the two channels. Using this representation we derive an exact equivalent Hamiltonian for the two channel model expressed entirely in terms of Majorana fermions. The part of the Hamiltonian that is coupled to the impurity spin corresponds to the vector part of the $\sigma$$\tau$ model (compactified two channel model). Consequently all the thermodynamic properties associated with the impurity spin can be calculated from the $\sigma$$\tau$ model alone. The equivalent model can be used to confirm the interpretation of the manybody excitation spectrum of the low energy fixed point of the twochannel model as due to free Majorana fermions with appropriate boundary conditions.
 Publication:

arXiv eprints
 Pub Date:
 May 1997
 DOI:
 10.48550/arXiv.condmat/9705199
 arXiv:
 arXiv:condmat/9705199
 Bibcode:
 1997cond.mat..5199Z
 Keywords:

 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 4 pages, revtex, no figures