Non-Hermitian skin effect and electronic nonlocal transport
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914465445838848 |
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| author | Payá, Carlos Solow, Oliver Prada, Elsa Aguado, Ramón Flensberg, Karsten |
| author_facet | Payá, Carlos Solow, Oliver Prada, Elsa Aguado, Ramón Flensberg, Karsten |
| contents | Open quantum systems governed by non-Hermitian effective Hamiltonians exhibit unique phenomena, such as the non-Hermitian skin effect, where eigenstates localize at system boundaries. We investigate this effect in a Rashba nanowire coupled to a ferromagnetic lead and demonstrate that it can be detected via nonlocal transport spectroscopy: while local conductance remains symmetric, the nonlocal conductance becomes nonreciprocal. We account for this behavior using both conventional transport arguments and the framework of non-Hermitian physics. Furthermore, we explain that exceptional points shift in parameter space when transitioning from periodic to open boundary conditions, a phenomenon observed in other non-Hermitian systems but so far not explained. Our results establish transport spectroscopy as a tool to probe non-Hermitian effects in open electronic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_00921 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-Hermitian skin effect and electronic nonlocal transport Payá, Carlos Solow, Oliver Prada, Elsa Aguado, Ramón Flensberg, Karsten Mesoscale and Nanoscale Physics Open quantum systems governed by non-Hermitian effective Hamiltonians exhibit unique phenomena, such as the non-Hermitian skin effect, where eigenstates localize at system boundaries. We investigate this effect in a Rashba nanowire coupled to a ferromagnetic lead and demonstrate that it can be detected via nonlocal transport spectroscopy: while local conductance remains symmetric, the nonlocal conductance becomes nonreciprocal. We account for this behavior using both conventional transport arguments and the framework of non-Hermitian physics. Furthermore, we explain that exceptional points shift in parameter space when transitioning from periodic to open boundary conditions, a phenomenon observed in other non-Hermitian systems but so far not explained. Our results establish transport spectroscopy as a tool to probe non-Hermitian effects in open electronic systems. |
| title | Non-Hermitian skin effect and electronic nonlocal transport |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.00921 |