[2111.11914] Non-Hermitian pseudo mobility edge in a coupled chain system Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Condensed Matter > Mesoscale and Nanoscale Physics arXiv:2111.11914 (cond-mat) [Submitted on 23 Nov 2021 ( v1 ), last revised 16 Jun 2022 (this version, v2)] Title: Non-Hermitian pseudo mobility edge in a coupled chain system Authors: Sen Mu , Longwen Zhou , Linhu Li , Jiangbin Gong View a PDF of the paper titled Non-Hermitian pseudo mobility edge in a coupled chain system, by Sen Mu and 3 other authors View PDF HTML (experimental) Abstract: In this work, we explore interesting consequences arising from the coupling between a clean non-Hermitian chain with skin localization and a delocalized chain of the same length under various boundary conditions (BCs). We reveal that in the ladder with weak rung coupling, the nonHermitian skin localization could induce a pseudo mobility edge in the complex energy plane, which separates states with extended and localized profiles yet allowing unidirectional transport of signals. We also demonstrate the gradual takeover of the non-Hermitian skin effect in the entire system with the increase of the rung coupling under conventional open BC. When taking open BC for the nonHermitian chain and periodic BC for the other, it is discovered that a quantized winding number defined under periodic BC could characterize the transition from the pseudo mobility edge to the trivial extended phases, establishing a "bulk-defect correspondence" in our quasi-1D non-Hermitian system. This work hence unveils more subtle properties of non-Hermitian skin effects and sheds light on the topological nature of the non-Hermitian localized modes in the proximity to systems with dissimilar localization properties. Comments: Accepted version Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; Statistical Mechanics (cond-mat.stat-mech); Quantum Physics (quant-ph) Cite as: arXiv:2111.11914 [cond-mat.mes-hall] (or arXiv:2111.11914v2 [cond-mat.mes-hall] for this version) https://doi.org/10.48550/arXiv.2111.11914 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. B 105, 205402 (2022) Related DOI : https://doi.org/10.1103/PhysRevB.105.205402 Focus to learn more DOI(s) linking to related resources Submission history From: Longwen Zhou [ view email ] [v1] Tue, 23 Nov 2021 14:55:37 UTC (5,094 KB) [v2] Thu, 16 Jun 2022 07:59:21 UTC (5,812 KB) Full-text links: Access Paper: View a PDF of the paper titled Non-Hermitian pseudo mobility edge in a coupled chain system, by Sen Mu and 3 other authors View PDF HTML (experimental) TeX Source view license Current browse context: cond-mat.mes-hall < prev | next > new | recent | 2021-11 Change to browse by: cond-mat cond-mat.stat-mech quant-ph References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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