Work

Anderson-skin dualism: A boundary-dependent effect in non-Hermitian disordered coupled systems

Year: 2025

Type: article

Abstract: We report a localization phenomenon that emerges in non-Hermitian and quasiperiodic coupled systems, which we dub ``Anderson-skin (AS) dualism''. The emergence of AS dualism is due to the fact that non-Hermitian topological systems provide nontrivial topology for disordered systems, causing the originally localized Anderson modes to transform into skin modes, i.e., the localized states within the point gap regions have dual characteristics of localization under periodic boundary condition and skin effects under open boundary conditions. As an example, we analytically prove the one-dimensional AS dualism through the transfer matrix method. Moreover, by discussing many-body interacting systems, we confirm that AS dualism is universal.

Source: Physical review. B./Physical review. B

DOI: 10.1103/vz12-2qn3

Authors: Shan-Zhong Li, Linhu Li, Shi-Liang Zhu, Zhi Li

Institutions: South China Normal University, Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area

Language: English

Topic: Quantum Mechanics and Non-Hermitian Physics

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Key Research and Development Program of China, Basic and Applied Basic Research Foundation of Guangdong Province

Awards: G5346586884, G7021765971