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

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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Veröffentlicht in:arXiv.org 2016-10
Hauptverfasser: Muñoz, Enrique, Zamani, Farzaneh, Merker, Lukas, Costi, Theo, Kirchner, Stefan
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Physics - Strongly Correlated Electrons
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Zamani, Farzaneh
Merker, Lukas
Costi, Theo
Kirchner, Stefan
description 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.
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title The renormalized superperturbation theory (SPT) approach to the Anderson model in and out of equilibrium
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