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On the non-hermitian Kitaev chain
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Nordic Institute for Theoretical Physics (Nordita).ORCID iD: 0000-0003-4479-7106
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 22025 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, E-ISSN 1751-8121, Vol. 58, no 20, article id 205302Article in journal (Refereed) Published
Abstract [en]

We study the non-hermitian Kitaev chain model, for arbitrary complex parameters. In particular, we give a concise characterization of the curves of eigenvalues in the complex plane in the infinite size limit, using a novel method which can be applied to other non-hermitian systems. Using this solution, we characterize under which conditions the skin effect is absent, and for which eigenstates this is the case. We also fully determine the region in parameter space for which the model has a zero mode.

Place, publisher, year, edition, pages
2025. Vol. 58, no 20, article id 205302
Keywords [en]
Kitaev chain, non-hermitian systems, skin effect, zero modes
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:su:diva-243896DOI: 10.1088/1751-8121/add4d3ISI: 001488217900001Scopus ID: 2-s2.0-105005448347OAI: oai:DiVA.org:su-243896DiVA, id: diva2:1965528
Available from: 2025-06-09 Created: 2025-06-09 Last updated: 2025-06-09Bibliographically approved

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Ardonne, EddyKurasov, Viktor

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