Two-scale analysis of the SU(N) Kondo Model
D. Villani, E. Lange, A. Avella, G. Kotliar
Abstract
We show how to resolve coherent low-energy features embedded in a broad high-energy background by use of a fully self-consistent calculation for composite particle operators. The method generalizes the formulation of Roth, which linearizes the dynamics of composite operators at any energy scale. Self-consistent equations are derived and analyzed in the case of the single-impurity SU(N) Kondo model.
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