The renormalized superperturbation theory (SPT) approach to the Anderson model in and out of equilibrium

The properties of current-carrying steady states of strongly correlated systems away from the linear-response regime are of topical interest. In this article, we review the renormalized perturbation theory, or renormalized SPT of reference [1] for the Anderson model. We present an extension to highe...

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Bibliographic Details
Published in:arXiv.org 2016-10
Main Authors: Muñoz, Enrique, Zamani, Farzaneh, Merker, Lukas, Costi, Theo, Kirchner, Stefan
Format: Article
Language:English
Subjects:
Perturbation theory
Online Access:Get full text
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Summary:The properties of current-carrying steady states of strongly correlated systems away from the linear-response regime are of topical interest. In this article, we review the renormalized perturbation theory, or renormalized SPT of reference [1] for the Anderson model. We present an extension to higher orders and compare the higher-order results with NRG calculations. Finally, we elucidate the role of Ward identities in calculating out-of-equilibrium properties and address claims made in the literature.
ISSN:2331-8422
DOI:10.48550/arxiv.1610.06824