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 …

The study of open quantum systems–microscopic systems exhibiting quantum coherence
that are coupled to their environment–has become increasingly important in the past years …

Hybrid systems of laser-cooled trapped ions and ultracold atoms combined in a single
experimental setup have recently emerged as a new platform for fundamental research in …

We experimentally investigate the action of a localized dissipative potential on a
macroscopic matter wave, which we implement by shining an electron beam on an atomic …

We experimentally study a driven-dissipative Josephson junction array, realized with a
weakly interacting Bose-Einstein condensate residing in a one-dimensional optical lattice …

We report on the observation of negative differential conductivity (NDC) in a quantum
transport device for neutral atoms employing a multimode tunneling junction. The system is …

Utilizing exact diagonalization techniques, we investigate a one-dimensional, nonreciprocal,
interacting hard-core boson model under a Stark potential with tail curvature. By employing …

Coherent perfect absorption is the complete extinction of incoming radiation by a complex
potential in a physical system supporting wave propagation. The concept was proven for …

We study a one-dimensional system of interacting spinless fermions subject to a localized
loss, where the interplay of gapless quantum fluctuations and particle interactions leads to …

An isolated quantum gas with a localized loss features a nonmonotonic behavior of the
particle loss rate as an incarnation of the quantum Zeno effect, as recently shown in …