Correlated lattice models in the local approximation — Aspects of a numerical renormalization group treatment
Journal of Low Temperature Physics(1995)
Abstract
The numerical renormalization group method is applied to an Anderson impurity with an energy dependent coupling to the conduction band. We describe how the discrete spectra resulting from the numerical calculation can be reliably smoothed using a continued fraction expansion. The investigations are connected with the study of models in infinite spatial dimensions.
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Key words
electron correlation,lattice model,green function,continued fraction expansion,hubbard model,electric conductivity
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