This article reviews, from a very personal point of view, the origins and the early work on
transitions driven by topological defects such as vortices in the two dimensional planar rotor …

New developments in superconductivity, particularly through unexpected and often
surprising forms of superconducting materials, continue to excite the community and …

We report on the creation of homogeneous Fermi gases of ultracold atoms in a uniform
potential. In the momentum distribution of a spin-polarized gas, we observe the emergence …

Phase transitions are ubiquitous in our three-dimensional world. By contrast, most
conventional transitions do not occur in infinite uniform low-dimensional systems because of …

We experimentally investigate the first-order correlation function of a trapped Fermi gas in
the two-dimensional BEC-BCS crossover. We observe a transition to a low-temperature …

The collective behaviour of a many-body system near a continuous phase transition is
insensitive to the details of its microscopic physics; for example, thermodynamic observables …

Molecular quantum gases (that is, ultracold and dense molecular gases) have many
potential applications, including quantum control of chemical reactions, precision …

Owing to thermal fluctuations, two-dimensional (2D) systems cannot undergo a conventional
phase transition associated with the breaking of a continuous symmetry. Nevertheless they …

Superfluidity in its various forms has been of interest since the observation of frictionless flow
in liquid helium II,. In three spatial dimensions it is conceptually associated with the …

The condensation of fermion pairs lies at the heart of superfluidity. However, for strongly
correlated systems with reduced dimensionality the mechanisms of pairing and …