Exceptional points (EPs) are singularities in the spectra of non-Hermitian operators where
eigenvalues and eigenvectors coalesce. Open quantum systems have recently been …

Many-body interactions give rise to the appearance of exotic phases in Hermitian physics.
Despite their importance, many-body effects remain an open problem in non-Hermitian …

Finite simplex lattice models are used in different branches of science, eg, in condensed-
matter physics, when studying frustrated magnetic systems and non-Hermitian localization …

Coaxing vibrations in the regimes of both large mass and high temperature into their
motional quantum ground states is extremely challenging, because it requires an ultra-high …

Identifying phase boundaries of interacting systems is one of the key steps to understanding
quantum many-body models. The development of various numerical and analytical methods …

Hamiltonian exceptional points (HEPs) are spectral degeneracies of non-Hermitian
Hamiltonians describing classical and semiclassical open systems with losses and/or gain …

Recent years have seen a surge of interest in exceptional points in open quantum systems.
The natural approach in this area has been the use of Markovian master equations. While …

We show that the loss of nonclassicality (including quantum entanglement) cannot be
compensated by the (incoherent) amplification of PT-symmetric systems. We address this …

We study the applicability of the Liouvillian exceptional points (LEPs) approach to nanoscale
open quantum systems. A generic model of the driven two-level system in a thermal …

Hamiltonian exceptional points (HEPs) are spectral degeneracies of non-Hermitian
Hamiltonians describing classical and semiclassical open systems with gain and/or loss …