This article reviews recent developments in the non-Hermitian skin effect (NHSE),
particularly on its rich interplay with topology. The review starts off with a pedagogical …

Over the past decade, topology has emerged as a major branch in broad areas of physics,
from atomic lattices to condensed matter. In particular, topology has received significant …

Rapidly growing demands for fast information processing have launched a race for creating
compact and highly efficient optical devices that can reliably transmit signals without losses …

The topological properties of an object, associated with an integer called the topological
invariant, are global features that cannot change continuously but only through abrupt …

A system is non-Hermitian when it exchanges energy with its environment and
nonreciprocal when it behaves differently upon the interchange of input and response …

A non-Hermitian system can exhibit extensive sensitivity of its complex energy spectrum to
the imposed boundary conditions, which is beyond any known phenomenon from Hermitian …

Non-Hermiticity from nonreciprocal hoppings has been shown recently to demonstrate the
non-Hermitian skin effect (NHSE) under open boundary conditions (OBCs). Here we study …

The conventional bulk-boundary correspondence directly connects the number of
topological edge states in a finite system with the topological invariant in the bulk band …

The classification of topological insulators predicts the existence of high-dimensional
topological phases that cannot occur in real materials, as these are limited to three or fewer …

Topological physics opens up a plethora of exciting phenomena allowing to engineer
disorder-robust unidirectional flows of light. Recent advances in topological protection of …