English

Non-Hermitian skin effect and electronic nonlocal transport

Mesoscale and Nanoscale Physics 2026-04-14 v2

Abstract

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.

Keywords

Cite

@article{arxiv.2510.00921,
  title  = {Non-Hermitian skin effect and electronic nonlocal transport},
  author = {Carlos Payá and Oliver Solow and Elsa Prada and Ramón Aguado and Karsten Flensberg},
  journal= {arXiv preprint arXiv:2510.00921},
  year   = {2026}
}

Comments

7 pages, 4 figures, Final version