Non-Hermitian optics is a burgeoning field at the intersection of quantum physics,
electrodynamics, and nanophotonics. It provides a new perspective of the role of gain and …

A review is given on the foundations and applications of non-Hermitian classical and
quantum physics. First, key theorems and central concepts in non-Hermitian linear algebra …

Exploiting the interplay between gain, loss and the coupling strength between different
optical components creates a variety of new opportunities in photonics to generate, control …

Recent progress on nonlinear properties of parity-time (PT)-symmetric systems is
comprehensively reviewed in this article. PT symmetry started out in non-Hermitian quantum …

Optical systems combining balanced loss and gain provide a unique platform to implement
classical analogues of quantum systems described by non-Hermitian parity–time (PT) …

Compound-photonic structures with gain and loss provide a powerful platform for testing
various theoretical proposals on non-Hermitian parity–time-symmetric quantum mechanics …

We propose and analyze a new approach based on parity-time (PT) symmetric microcavities
with balanced gain and loss to enhance the performance of cavity-assisted metrology. We …

Both theoretical and experimental studies of topological phases in non-Hermitian systems
have made a remarkable progress in the last few years of research. In this article, we review …

The recently developed notion of parity–time (PT) symmetry in optical systems has spawned
intriguing prospects. So far, most experimental implementations have been reported in solid …

The most intriguing properties of non-Hermitian systems are found near the exceptional
points (EPs) at which the Hamiltonian matrix becomes defective. Because of the complex …