A recent rejuvenation of experimental and theoretical interest in the physics of few-body
systems has provided deep, fundamental insights into a broad range of problems. Few-body …

Cold atomic gases have become a paradigmatic system for exploring fundamental physics,
which at the same time allows for applications in quantum technologies. The accelerating …

We demonstrate the formation of a single RbCs molecule during the merging of two optical
tweezers, one containing a single Rb atom and the other a single Cs atom. Both atoms are …

Knowing when a physical system has reached sufficient size for its macroscopic properties
to be well described by many-body theory is difficult. We investigated the crossover from few …

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 …

We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains
consisting of up to four fermionic atoms in a one-dimensional trap. These chains are …

We review the current understanding of the uniform two-dimensional (2D) Fermi gas with
short-range interactions. We first outline the basics of two-body scattering in 2D, including a …

Recent theoretical and experimental progress on studying one-dimensional systems of
bosonic, fermionic, and Bose–Fermi mixtures of a few ultracold atoms confined in traps is …

We study quasi-one-dimensional few-particle systems consisting of one to six ultracold
fermionic atoms in two different spin states with attractive interactions. We probe the system …

We show that strongly interacting multicomponent gases in one dimension realize an
effective spin chain, offering an alternative simple scenario for the study of one-dimensional …