Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session D66: Topological States in AMO Systems I
3:00 PM–5:48 PM,
Monday, March 6, 2023
Room: Room 413
Sponsoring
Unit:
DAMOP
Chair: Ying Su, University of Texas at Dallas
Abstract: D66.00011 : Dynamical Degeneracy Splitting and Directional Invisibility in Non-Hermitian Systems
5:24 PM–5:36 PM
Presenter:
Kai Zhang
(University of Michigan)
Author:
Kai Zhang
(University of Michigan)
Here, we establish the scattering theory in the two-dimensional non-Hermitian lattice and propose directional invisibility in non-Hermitian systems. Directional invisibility means that the reflected wave of an incident wave packet can be seen in several directions but is invisible in most spatial directions. It originates from the anisotropic decay of the non-Hermitian system and can be utilized to probe the geometry-dependent skin effect. In addition, we define the frequency-resolved NHSE based on the non-Hermitian scattering theory.
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