Functional renormalization group for non-Hermitian and $\mathcal{PT}$-symmetric systems

Functional renormalization group for non-Hermitian and $\mathcal{PT}$-symmetric systems

We generalize the vertex expansion approach of the functional renormalization group to non-Hermitian systems. As certain anomalous expectation values might not vanish, additional terms as compared to the Hermitian case can appear in the flow equations. We investigate the merits and shortcomings o...

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Bibliographic Details
Main Author: Lukas Grunwald, Volker Meden, Dante M. Kennes
Format: Article
Language:English
Published: SciPost 2022-05-01
Series:SciPost Physics
Online Access:https://scipost.org/SciPostPhys.12.5.179

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