Eigenstates of a non-Hermitian system exist on complex Riemannian manifolds, with
multiple sheets connecting at branch cuts and exceptional points (EPs). These eigenstates …

Non-Hermitian Hamiltonians, and particularly parity-time (PT) and anti-PT symmetric
Hamiltonians, play an important role in many branches of physics, from quantum mechanics …

Non-Hermitian photonic lattices combine the peculiar consequences of energy non-
conservation with the physics of bandstructures, giving rise to a variety of exotic properties …

Non-Hermitian systems around exceptional points (EPs) demonstrate increased sensitivity
as the EP order increases. We propose a protocol for constructing a reconfigurable non …

Different from the Hermitian case, non-Hermitian (NH) systems have novel properties and
strongly relate to open and dissipative quantum systems. In this work, we investigate how to …

Optical parametric oscillation can convert the input laser into a couple of coherent optical
output with signal and idler frequencies. It is an important method for the realization of the …

In this work, the optical properties and dynamical behaviors of the optical parametric
oscillation under the anti Parity-Time (anti-PT) symmetry are studied. The non-Hermitian …

Hermiticity is the fundamental property of the physical systems, for which it should obey the
laws of energy conservation and time-reversal symmetry. Parity-time symmetry is introduced …