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 …

Dissipation in mechanics, optics, acoustics, and electronic circuits is nowadays recognized
to be not always detrimental but can be exploited to achieve non-Hermitian topological …

Mutually coupled modes of a pair of active LRC circuits, one with amplification and another
with an equivalent amount of attenuation, provide an experimental realization of a wide …

Controlling light transport in nonlinear active environments is a topic of considerable interest
in the field of optics. In such complex arrangements, of particular importance is to devise …

The notion of non-Hermitian optics and photonics rooted in quantum mechanics and
photonic systems has recently attracted considerable attention ushering in tremendous …

We show both theoretically and experimentally that a pair of inductively coupled active LRC
circuits (dimer), one with amplification and another with an equivalent amount of attenuation …

We study the parity-and time-reversal (PT) symmetric non-Hermitian Su-Schrieffer-Heeger
(SSH) model with two conjugated imaginary potentials±i γ at two end sites. The SSH model …

In this paper, we study the properties of two-dimensional lattices in the presence of non-
Hermitian disorder. In the context of coupled mode theory, we consider random gain-loss …

We provide the first experimental demonstration of defect states in parity-time (PT) symmetric
mesh-periodic potentials. Our results indicate that these localized modes can undergo an …

We consider a class of PT-symmetric systems which include mutually matched nonlinear
loss and gain (in other words, a class of PT-invariant Hamiltonians in which both the …