Programme

I.9 -- Invited, VCTP-50

Date: Thursday, 7 August 2025

Time: 10:30 - 11:10

Theory for the non-Hermitian skin effect

Yang Zhesen

Asia Pacific Center for Theoretical Physics, Pohang, Korea

The non-Hermitian skin effect, which represents a phenomenon where almost all the open boundary condition (OBC) eigenstates can be exponentially localized at the boundary, has drawn a lot of attention recently. From a theoretical viewpoint, building a theory to describe these exponentially-localized skin modes is a basic starting point at the first stage. For one-dimensional (1D) systems, this can be achieved by the generalized Brillouin zone (GBZ) theory, that is, both the OBC eigenvalues and eigenstates can be calculated analytically in the N → ∞ limit. For 2D systems, although some efforts have been made to establish the corresponding GBZ theory, a universal framework is still lacking. In this talk, I will introduce our recent progress on the 2D GBZ theory, which can be applied to general 2D non-Hermitian systems under general OBC geometries.

Presenter: Yang Zhesen