In the past few years, concepts from non-Hermitian (NH) physics, originally developed within
the context of quantum field theories, have been successfully deployed over a wide range of …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

From biological ecosystems to spin glasses, connectivity plays a crucial role in determining
the function, dynamics, and resiliency of a network. In the realm of non-Hermitian physics …

The invention of the laser has revolutionized modern science and engineering as well as
our daily lives. Recently, a new class of lasers based on concepts borrowed from parity–time …

Topological insulator lasers (TILs) are a recently introduced family of lasing arrays in which
phase locking is achieved through synthetic gauge fields. These single frequency light …

The ability to tailor the hop** interactions between the constituent elements of a physical
system could enable the observation of unusual phenomena that are otherwise inaccessible …

By preparing a sensor system around isolated exceptional points, one can obtain a great
enhancement of the sensitivity benefiting from the non‐Hermiticity. However, this comes at …

Non-Hermitian exceptional points (EPs) represent a special type of degeneracy where not
only the eigenvalues coalesce, but also the eigenstates tend to collapse on each other …

Symmetry plays fundamental role in physics and the nature of symmetry changes in non-
Hermitian physics. Here the symmetry-protected scattering in non-Hermitian linear systems …

Exceptional point and spectral singularity are two types of singularity that are unique to non-
Hermitian systems. Here, we report the high-order spectral singularity as a high-order pole …