Non-Hermitian skin effect induced by Rashba-Dresselhaus spin-orbit coupling

Abstract

1D chains with non-reciprocal tunneling realizing the non-Hermitian skin effect (NHSE) have attracted considerable interest in the last years whereas their experimental realization in real space remains limited to a few examples. In this work, we propose a new generic way of implementing non-reciprocity based on a combination of the Rashba-Dresshlauss spin-orbit coupling, existing for electrons, cold atoms, and photons, and a lifetime imbalance between two spin components. We show that one can realize the Hatano-Nelson model, the non-Hermitian Su-Schrieffer-Heeger model, and even observe the NHSE in a 1D potential well without the need for a lattice. We further demonstrate the practical feasibility of this proposal by considering the specific example of a photonic liquid crystal microcavity. This platform allows one to switch on and off the NHSE by applying an external voltage to the microcavity.

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Cited by in corpus (6)

• Non-Bloch band theory for non-Hermitian continuum systems
• Non-Hermitian minimal Kitaev chains
• Topological enhancement of exciton-polariton coherence with non-Hermitian morphing
• Supercurrent from the imaginary part of the Andreev levels in non-Hermitian Josephson junctions
• Non-Hermitian skin effect and electronic nonlocal transport
• Floquet multiple exceptional points with higher-order skin effect