Since the achievement of quantum degeneracy in gases of chromium atoms in 2004, the
experimental investigation of ultracold gases made of highly magnetic atoms has …

This article reviews recent theoretical and experimental advances in the fundamental
understanding and active control of quantum fluids of light in nonlinear optical systems. In …

The author presents a tutorial review of some ideas that are basic to our current
understanding of the phenomenon of Bose-Einstein condensation (BEC) in the dilute atomic …

We report the observation of coexisting Bose-Einstein condensate (BEC) and Fermi gas in a
magnetic trap. With a very small fraction of thermal atoms, the 7 Li condensate is quasipure …

In this review, we discuss the properties of a few impurity atoms immersed in a gas of
ultracold fermions—the so-called Fermi polaron problem. On one hand, this many-body …

Bose-Einstein condensates of rubidium atoms are stored in a two-dimensional periodic
dipole force potential, formed by a pair of standing wave laser fields. The resulting potential …

We review phase-space techniques based on the Wigner representation that provide an
approximate description of dilute ultra-cold Bose gases. In this approach the quantum field …

We review the theory of vortices in trapped dilute Bose-Einstein condensates and compare
theoretical predictions with existing experiments. Mean-field theory based on the time …

We find that pancake dipolar condensates can exhibit a roton-maxon character of the
excitation spectrum, so far observed only in superfluid helium. We also obtain a condition for …

We report on the observation of nonclassical rotational inertia in solid helium-4 confined to
an annular channel in a sample cell under torsional motion, demonstrating superfluid …