Modified generalized Brillouin zone theory in non-Hermitian systems without translational invariance

Date

Dec 3, 2025

Time

11:00 AM - 12:00 PM

Speaker

Hongfang Liu

Affiliation

School of Physical Science and Technology, Soochow University, Suzhou, China

Language

en

Main Topic

Materialien

Host

Grit Rötzer

Description

The non-Hermitian skin effect (NHSE) is a fundamentally distinct phenomenon in non-Hermitian systems, and has no Hermitian analogs. It has lately reshaped the way we understand band structures and topology: the NHSE disrupts the bulk-boundary correspondence between open and periodic boundary conditions’ spectra. How to accurately characterize the NHSE is of importance. Thus, it prompts the development of the generalized Brillouin zone (GBZ) theory. In this talk, I shall introduce modified GBZ theory in non-Hermitian systems without well-defined translational invariance, which captures the influence of disorder, magnetic effects, and non-orientability on the non-Hermitian skin effect. This modified GBZ scheme reveals how the skin effect interacts with disorder or magnetic effects, and how a Möbius-strip configuration alters the skin mode’s localization behavior. .

Links

• Seminars at the IFW

Last modified: Dec 3, 2025, 7:37:31 AM