Auxiliary Master Equation for Nonequilibrium Dual-Fermion Approach

Feng Chen, Guy Cohen, Michael Galperin

Research output: Contribution to journalArticlepeer-review

Abstract

We introduce an auxiliary quantum master equation dual fermion method and argue that it presents a convenient way to describe steady states of correlated impurity models. The scheme yields an expansion around a reference that is much closer to the true nonequilibrium state than that in the original dual fermion formulation. In steady-state situations, the scheme is numerically inexpensive and avoids time propagation. The Anderson impurity model is used to test the approach against numerically exact benchmarks.

Original languageEnglish
Article number186803
JournalPhysical Review Letters
Volume122
Issue number18
DOIs
StatePublished - 10 May 2019

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