Publikation: Non-Hermitian Topology in Multiterminal Superconducting Junctions
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2025
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Deutsche Forschungsgemeinschaft (DFG): 425217212
Deutsche Forschungsgemeinschaft (DFG): 467596333
Deutsche Forschungsgemeinschaft (DFG): 467596333
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Physical Review Letters. American Physical Society. 2025, 134(15), 156601. ISSN 0031-9007. eISSN 1079-7114. Verfügbar unter: doi: 10.1103/PhysRevLett.134.156601
Zusammenfassung
Recent experimental advancements in dissipation control have yielded significant insights into non-Hermitian Hamiltonians for open quantum systems. Of particular interest are the topological characteristics exhibited by these non-Hermitian systems, that arise from exceptional points—distinct degeneracies unique to such systems. In this Letter, we focus on Andreev bound states in multiterminal Josephson junctions with non-Hermiticity induced by normal metal or ferromagnetic leads. By investigating several systems of different synthetic dimensions and symmetries, we predict fragile and stable non-Hermitian topological phases in these engineered superconducting systems.
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530 Physik
Schlagwörter
Superconductivity, Andreev bound states, Josephson junctions, Topological phases of matter, Exceptional points, Non-Hermitian systems, Green`s function methods, Methods in superconductivity, Symmetries in condensed matter, Topology
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OHNMACHT, David, Valentin WILHELM, Hannes WEISBRICH, Wolfgang BELZIG, 2025. Non-Hermitian Topology in Multiterminal Superconducting Junctions. In: Physical Review Letters. American Physical Society. 2025, 134(15), 156601. ISSN 0031-9007. eISSN 1079-7114. Verfügbar unter: doi: 10.1103/PhysRevLett.134.156601BibTex
@article{Ohnmacht2025-04-15NonHe-71285.2,
title={Non-Hermitian Topology in Multiterminal Superconducting Junctions},
year={2025},
doi={10.1103/PhysRevLett.134.156601},
number={15},
volume={134},
issn={0031-9007},
journal={Physical Review Letters},
author={Ohnmacht, David and Wilhelm, Valentin and Weisbrich, Hannes and Belzig, Wolfgang},
note={Article Number: 156601}
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