Physics

Activating non-Hermitian skin modes by parity-time symmetry breaking

Z. Lei, C. H. Lee, et al.

This groundbreaking research by Zhoutao Lei, Ching Hua Lee, and Linhu Li explores the fascinating realm of parity-time (PT) symmetry as a design approach for higher-dimensional non-Hermitian states, revealing how directional toggling of the non-Hermitian skin effect can be achieved across various platforms.

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Abstract

This work proposes parity-time (PT) symmetry as a design paradigm for higher-dimensional non-Hermitian states exhibiting unique bulk, surface, hinge, or corner dynamics. By selectively breaking or restoring PT symmetry in different system sectors, the non-Hermitian skin effect (NHSE) can be manipulated in both bulk and topological boundary states. The study demonstrates directional toggling of NHSE, boundary state flow without chiral or dynamical pumping, and the interplay of PT and charge-parity (CP) symmetry in 3D systems. These PT-activated NHSEs are observable in various platforms including optical, photonic, electric, and quantum systems.

Publisher

Communications Physics

Published On

Mar 19, 2024

Authors

Zhoutao Lei, Ching Hua Lee, Linhu Li