Non-hermitian topology in multiterminal superconducting junctions
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911249461149696 |
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| author | Ohnmacht, David Christian Wilhelm, Valentin Weisbrich, Hannes Belzig, Wolfgang |
| author_facet | Ohnmacht, David Christian Wilhelm, Valentin Weisbrich, Hannes Belzig, Wolfgang |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_01289 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Non-hermitian topology in multiterminal superconducting junctions Ohnmacht, David Christian Wilhelm, Valentin Weisbrich, Hannes Belzig, Wolfgang Mesoscale and Nanoscale Physics Superconductivity 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. |
| title | Non-hermitian topology in multiterminal superconducting junctions |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2408.01289 |