Two-channel Anderson Impurity Model: Single-electron Green's function, self-energies, and resistivity

TL;DR

This paper provides exact low-energy calculations of the Green's function, self-energies, and resistivity for the two-channel Anderson impurity model, using boundary conformal field theory and Bethe Ansatz, revealing detailed crossover behaviors.

Contribution

It introduces an exact solution for key electronic properties of the two-channel Anderson model, extending previous results from the two-channel Kondo model.

Findings

Exact low-energy Green's function and self-energies computed

Detailed crossover between integer valence limits characterized

Results connect model parameters with physical observables

Abstract

We compute exactly the low-energy single-electron Green's function, the impurity and electron self-energies, and the resistivity for the two-channel Anderson impurity model. These results are obtained by exploiting the boundary conformal field theory identified from the Bethe Ansatz solution of the model. Using that solution we can make contact with the parameters of the original Hamiltonian and provide the detailed crossover between the two integer valence limits. Our results generalize those obtained previously in the context of the two-channel Kondo model.