The current understanding of the role of topology in non-Hermitian (NH) systems and its far-
reaching physical consequences observable in a range of dissipative settings are reviewed …

Interpreting wave phenomena in terms of an underlying ray dynamics adds a new
dimension to the analysis of linear wave equations. Forming explicit connections between …

We present a conjecture relating the density of quantum resonances for an open chaotic
system to the fractal dimension of the associated classical repeller. Mathematical arguments …

Recent experiments have reported that novel physics emerge in open quantum many-body
systems due to an interplay of interactions and dissipation, which stimulate theoretical …

We review recent research on the transport properties of classical waves through chaotic
systems with special emphasis on microwaves and sound waves. Inasmuch as these …

We present microwave experiments on the symmetry reduced five-disk billiard studying the
transition from a closed to an open system. The measured microwave reflection signal is …

We study the wave functions and transmission properties of an open microwave cavity in the
frequency range of 1–17 GHz. The transmission of microwaves between the input and …

For the paradigmatic three-disk scattering system, we confirm a recent conjecture for open
chaotic systems, which claims that resonance states are composed of two factors. In …

The far-field emission of two-dimensional stadium-shaped dielectric cavities is investigated.
Microlasers with such shape present a highly directional emission. We provide experimental …

Power spectral densities are a common, convenient, and powerful way to analyze signals,
so much so that they are now broadly deployed across the sciences and engineering—from …