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 …

A particular strength of ultracold quantum gases is the range of versatile detection methods
that are available. As they are based on atom–light interactions, the whole quantum optics …

We realize a scanning probe microscope using single trapped Rb 87 atoms to measure
optical fields with subwavelength spatial resolution. Our microscope operates by detecting …

Imaging is central to gaining microscopic insight into physical systems, and new microscopy
methods have always led to the discovery of new phenomena and a deeper understanding …

The combination of topology and quantum criticality can give rise to an exotic mix of
counterintuitive effects. Here, we show that unexpected topological properties take place in …

Using a single calcium ion confined in a surface-electrode trap, we study the interaction of
electric quadrupole transitions with a passively phase-stable optical standing wave field …

Controlling ultracold atoms with laser light has greatly advanced quantum science. The
wavelength of light sets a typical length scale for most experiments to the order of 500 …

Quantum annealing aims at solving optimization problems efficiently by preparing the
ground state of an Ising spin-Hamiltonian quantum mechanically. A prerequisite of building …

Quantum sensing exploits the fundamental features of a quantum system to achieve highly
efficient measurement of physical quantities. Here, we propose a strategy to realize a single …

Cavity quantum electrodynamics offers the possibility of observing and controlling the
motion of a few or individual atoms, enabling the realization of various quantum …