Signatures of exceptional points in multiterminal superconductor-normal metal junctions
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866917510417219584 |
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| author | Solow, Oliver Flensberg, Karsten |
| author_facet | Solow, Oliver Flensberg, Karsten |
| contents | We study a non-Hermitian, multiterminal superconducting-normal system in order to identify experimental signatures of exceptional points. We focus on a minimal setting with a single spinful level, spin-dependent normal leads, and a noncollinear magnetic field. This system hosts both topologically-protected, as well as symmetry-protected exceptional points. Using an exact transport formalism, we show that the exceptional points leave signatures visible through spectroscopy of the Andreev states, but that they have a minor effect on the Josephson current. We also argue that these findings hold with interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_00524 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Signatures of exceptional points in multiterminal superconductor-normal metal junctions Solow, Oliver Flensberg, Karsten Mesoscale and Nanoscale Physics We study a non-Hermitian, multiterminal superconducting-normal system in order to identify experimental signatures of exceptional points. We focus on a minimal setting with a single spinful level, spin-dependent normal leads, and a noncollinear magnetic field. This system hosts both topologically-protected, as well as symmetry-protected exceptional points. Using an exact transport formalism, we show that the exceptional points leave signatures visible through spectroscopy of the Andreev states, but that they have a minor effect on the Josephson current. We also argue that these findings hold with interactions. |
| title | Signatures of exceptional points in multiterminal superconductor-normal metal junctions |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2504.00524 |