Nonlinear responses and three-particle correlators in correlated electron systems exemplified by the Anderson impurity model
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DOI: 10.1103/physrevb.107.205108
Abstract: Three-particle correlators are relevant for, among others, Raman, Hall and non-linear responses. They are also required for the next order of approximations extending dynamical mean-field theory diagrammatically. We present a general formalism on how to… read more here.
Keywords: three particle; particle correlators; anderson impurity; particle ... See more keywords
Divergences of the irreducible vertex functions in correlated metallic systems: Insights from the Anderson impurity model
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DOI: 10.1103/physrevb.97.245136
Abstract: In this work, we analyze in detail the occurrence of divergences in the irreducible vertex functions for one of the fundamental models of many-body physics: the Anderson impurity model (AIM). These divergences -- a surprising… read more here.
Keywords: impurity model; divergences irreducible; model; irreducible vertex ... See more keywords