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  • Letter

Theoretical prediction of a non-Hermitian skin effect in ultracold-atom systems

Sibo Guo1,2,*, Chenxiao Dong1,2,*, Fuchun Zhang3,†, Jiangping Hu1,2,3,‡, and Zhesen Yang3,§

  • 1Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China

  • *These authors contributed equally to this work.
  • †Corresponding author: fuchun@ucas.ac.cn
  • ‡Corresponding author: jphu@iphy.ac.cn
  • §Corresponding author: yangzs@ucas.ac.cn
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Phys. Rev. A 106, L061302 – Published 20 December, 2022

DOI: https://doi.org/10.1103/PhysRevA.106.L061302

Abstract

We study the non-Hermitian skin effect in dissipative ultracold fermions with spin-orbit coupling, which has been implemented in a recent experiment (Z. Ren et al., Nat. Phys. 18, 385 (2022)). In this work we prove that the non-Hermitian skin effect in such a continuous system is robust to the variation of external parameters and trapping potentials. We further reveal a dynamic sticky effect in our system, which has a common physical origin with the non-Hermitian skin effect. Our work paves the way for studying novel physical responses of the non-Hermitian skin effect in quantum systems.

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Phys. Rev. A 106, L061302– Published 20 December, 2022
  • Received 15 November 2021
  • Revised 29 June 2022
  • Accepted 5 December 2022
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