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Scientific paper - Original scientific paper
Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra
Physical Review Research, 4 (2022), 4; 043219. https://doi.org/10.1103/PhysRevResearch.4.043219
Komis, Ioannis; Kaltsas, Dimitrios; Xia, Shiqi; Buljan, Hrvoje; Chen, Zhigang; Makris, Konstantinos G.

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Komis, I., Kaltsas, D., Xia, S., Buljan, H., Chen, Z. & Makris, K. G. (2022). Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra. Physical Review Research, 4. (4). doi: 10.1103/PhysRevResearch.4.043219

Komis, Ioannis, et al. "Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra." Physical Review Research, vol. 4, no. 4, 2022. https://doi.org/10.1103/PhysRevResearch.4.043219

Komis, Ioannis, Dimitrios Kaltsas, Shiqi Xia, Hrvoje Buljan, Zhigang Chen and Konstantinos G. Makris. "Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra." Physical Review Research 4, no. 4 (2022). https://doi.org/10.1103/PhysRevResearch.4.043219

Komis, I., et al. (2022) 'Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra', Physical Review Research, 4(4). doi: 10.1103/PhysRevResearch.4.043219

Komis I, Kaltsas D, Xia S, Buljan H, Chen Z, Makris KG. Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra. Physical Review Research [Internet]. 2022 December 29 [cited 2024 November 25];4(4). doi: 10.1103/PhysRevResearch.4.043219

I. Komis, D. Kaltsas, S. Xia, H. Buljan, Z. Chen and K. G. Makris, "Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra", Physical Review Research, vol. 4, no. 4, December 2022. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:259520. [Accessed: 25 November 2024]

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Metadata
Title (english)Robustness versus sensitivity in non-Hermitian topological lattices probed by pseudospectra
AuthorIoannis Komis
AuthorDimitrios Kaltsas
AuthorShiqi Xia
AuthorHrvoje Buljan
AuthorZhigang Chen
AuthorKonstantinos G. Makris
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Abstract (english)
Non-Hermitian topological systems simultaneously possess two antagonistic features: ultrasensitivity due to exceptional points and robustness of topological zero-energy modes, and it is unclear which one prevails under different perturbations. We study that question by applying the pseudospectrum theory on the prototypical nonHermitian Su-Schrieffer-Heeger lattice. Topological modes around the underlying third-order exceptional point (EP3) are robust with respect to chiral perturbations but sensitive to diagonal perturbations. In fact, exactly at the EP3 the chiral symmetry leads to a suppressed sensitivity, that corresponds to an EP2. Finally, for nonlinearly induced perturbations we provide a connection between the pseudospectrum approach and a nonlinear phase shift, which is relevant for experiments.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titlePhysical Review Research
Numberingvol. 4, no. 4, 043219
e-ISSN2643-1564
DOIhttps://doi.org/10.1103/PhysRevResearch.4.043219
URN:NBNurn:nbn:hr:217:259520
Publication2022-12-29
ProjectNumber: KK.01.1.1.01.0004
Title (croatian): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri
Title (english): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras
Acronym: QuantiXLie
Leader: Hrvoje Buljan
Jurisdiction: eu
Funding stream: European Regional Development Fund
Document URLhttps://link.aps.org/doi/10.1103/PhysRevResearch.4.043219
Type of resourceText
Access conditionsOpen access
Terms of useLicence Attribution 4.0 International (CC BY 4.0) icon
Public notePublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Received 17 February 2022; accepted 13 September 2022; published 29 December 2022.
Created on2024-08-03 10:17:41