A review on non-Hermitian skin effect

Understand

The past decades have witnessed the flourishing of non-Hermitian physics in non-conservative systems, leading to unprecedented phenomena of unidirectional invisibility, enhanced sensitivity and more recently the novel topological features such as bulk Fermi arcs.

• Among them, growing efforts have been invested to an intriguing phenomenon, known as the non-Hermitian skin effect (NHSE).
• Here, we review the recent progress in this emerging field.
• By starting from the one-dimensional (1D) case, the fundamental concepts of NHSE, its minimal model, the physical meanings and consequences are elaborated in details.