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Physical Review Research
Article . 2022 . Peer-reviewed
License: CC BY
Data sources: Crossref
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Physical Review Research
Article . 2022
Data sources: DOAJ
https://dx.doi.org/10.48550/ar...
Article . 2021
License: CC 0
Data sources: Datacite
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Non-Hermitian chiral anomalies

Authors: Sharareh Sayyad; Julia D. Hannukainen; Adolfo G. Grushin;

Non-Hermitian chiral anomalies

Abstract

The chiral anomaly underlies a broad number of phenomena, from enhanced electronic transport in topological metals to anomalous currents in the quark-gluon plasma. The discovery of topological states of matter in non-Hermitian systems -- effective descriptions of dissipative systems -- raises the question of whether there are anomalous conservation laws that remain unaccounted for. To answer this question, we consider both $1+1$ and $3+1$ dimensions, presenting a unified formulation to calculate anomalous responses in Hermitianized, anti-Hermitianized and non-Hermitian systems of massless electrons with complex Fermi velocities coupled to non-Hermitian gauge fields. Our results indicate that the quantum conservation laws of chiral currents of non-Hermitian systems are not related to those in Hermitianized and anti-Hermitianized systems, as would be expected classically, due to novel anomalous terms that we derive. These may have implications for a broad class of emerging experimental systems that realize non-Hermitian Hamiltonians.

7+16 pages, 1+5 figure

Country
France
Keywords

High Energy Physics - Theory, Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Mesoscale and Nanoscale Physics, Strongly Correlated Electrons (cond-mat.str-el), High Energy Physics - Theory (hep-th), Physics, QC1-999, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 530

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Top 10%
Average
Top 10%
Green
gold