After decades of improvements in cooling techniques of several atomic species and in
finding methods for the achievement of stable quantum mixtures, the field is now ready for …

Ultracold atoms, molecules and ions provide a unique playground to explore chemistry at
ultracold temperatures. In this Review, we discuss what makes these systems particularly …

Pairs of free particles cannot form bound states in an elastic collision due to momentum and
energy conservation. In many ultracold experiments, however, the particles collide in the …

Atoms with a highly excited electron, called Rydberg atoms, can form unusual types of
molecular bonds,,–. The bonds differ from the well-known ionic and covalent bonds, not only …

Scattering resonances are an essential tool for controlling the interactions of ultracold atoms
and molecules. However, conventional Feshbach scattering resonances, which have been …

A diversity of experimental techniques has been developed over the last 25 years to create
samples of molecular gases at temperatures close to the Absolute Zero—here we consider …

Recent years have seen the emergence of a new generation of collision and cold-chemistry
experiments in which cold atoms and ions are brought into contact in a controlled way in …

Induced interactions and bound states of charge carriers immersed in a quantum medium
are crucial for the investigation of quantum transport. Ultracold atom-ion systems can …

We explore the interaction between two trapped ions mediated by a surrounding quantum
degenerate Bose or Fermi gas. Using perturbation theory valid for weak atom-ion …

Feshbach association of ultracold molecules using narrow resonances requires exquisite
control of the applied magnetic field. Here, we present a magnetic field control system to …