Non-Hermitian skin effect in a domain-wall system

The non-Hermitian skin effect is one of the most striking features in physics. It reveals a novel phenomenon system that bulk wave function and energy spectrum are sensitively dependent on boundary conditions. concept generalized Brillouin zones has been proposed to characterize functions such systems . Based zones, non-Bloch topological invariants can reconstruct bulk-edge correspondence. Previous discussion mainly focused open conditions, calculation needs be reconsidered under domain-wall paper introduces related researches systems, including general form zone equation one-dimensional single-band model, SSH (Su-Schieffer-Heeger) experimental realization quantum walk system.