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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Format: | Article |
Language: | English |
Published: |
SciPost
2022-05-01
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Series: | SciPost Physics |
Online Access: | https://scipost.org/SciPostPhys.12.5.179 |