Renormalized perturbation theory and scaling for an impurity Anderson model

Abstract

We demonstrate the effectiveness of a generalized renormalized perturbational approach to calculate the induced magnetization for the single impurity Anderson model with a strong on-site interaction, using flow equations for renormalized parameters to scale from a weak correlation to a strong correlation regime. We show that, using simple approximation schemes in different parameter regimes, remarkably accurate results can be obtained for all magnetic field values by comparing the results with those from direct numerical renormalization group and Bethe ansatz calculations.

Submitted to Physical Review B; 8 pages, 10 figures

References in corpus (6)

• Renormalized Parameters for Impurity Models
• Renormalized perturbation calculations for the single impurity Anderson model
• Magnetic Field Effects on Quasiparticles in Strongly Correlated Local Systems
• The Strong Coupling Fixed-Point Revisited
• Field dependent quasiparticles in a strongly correlated local system II
• A new renormalization group approach for systems with strong electron correlation

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