High-frequency asymptotic behavior of self-energies in quantum impurity models

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Original languageEnglish
Article number73104
Journal / PublicationPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number7
Publication statusPublished - 15 Aug 2011
Externally publishedYes

Abstract

We present explicit expressions for the high-frequency asymptotic behavior of electron self-energy of general quantum impurity models, which may be useful for improving the convergence of dynamical mean-field calculations and for the analytic continuation of the electron self-energy. We also give results, expressed in more physical terms, for the two-orbital and three-orbital rotationally invariant Slater-Kanamori interactions, in order to facilitate calculations of transition metal oxides. © 2011 American Physical Society.