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Multifractality of Many-Body Non-Hermitian Skin Effect
Hamanaka, Shu ; Kawabata, Kohei
2024-01
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Título:
Multifractality of Many-Body Non-Hermitian Skin Effect
Autor:
Hamanaka, Shu
;
Kawabata, Kohei
Assuntos:
Physics - Mesoscale and Nanoscale Physics
;
Physics - Quantum Physics
;
Physics - Statistical Mechanics
;
Physics - Strongly Correlated Electrons
Descrição:
The non-Hermitian skin effect, anomalous localization of an extensive number of eigenstates induced by nonreciprocal dissipation, plays a pivotal role in non-Hermitian topology and significantly influences the open quantum dynamics. However, its genuinely quantum characterization in many-body systems has yet to be developed. Here, we elucidate that the skin effect manifests itself as multifractality in the many-body Hilbert space. This multifractality does not accompany the single-particle skin effect and hence is intrinsic to the many-body skin effect. Furthermore, we demonstrate that the many-body skin effect can coexist with spectral statistics of random matrices, in contrast to multifractality associated with the many-body localization, which necessitates the absence of ergodicity. We also illustrate multifractality caused by the Liouvillian skin effect in Markovian open quantum systems. Our work establishes a defining characterization of the non-Hermitian skin effect and uncovers a fundamental relationship between multifractality and ergodicity in open quantum many-body systems.
Data de criação/publicação:
2024-01
Idioma:
Inglês
Links
View paper in arXiv
View record in Cornell University$$FView record in $$GCornell University
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