Publikation: Non-hermitian topology in multiterminal superconducting junctions
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2024
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Deutsche Forschungsgemeinschaft (DFG): 425217212
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Core Facility der Universität Konstanz
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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 study, 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
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Mesoscale and Nanoscale Physics, Superconductivity, Andreev bound states, Josephson junctions
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OHNMACHT, David, Valentin WILHELM, Hannes WEISBRICH, Wolfgang BELZIG, 2024. Non-hermitian topology in multiterminal superconducting junctionsBibTex
@unpublished{Ohnmacht2024-08-02Nonhe-71285, year={2024}, doi={10.48550/arXiv.2408.01289}, title={Non-hermitian topology in multiterminal superconducting junctions}, author={Ohnmacht, David and Wilhelm, Valentin and Weisbrich, Hannes and Belzig, Wolfgang} }
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