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 …

Abstract The phenomenon of Bose-Einstein condensation of dilute gases in traps is
reviewed from a theoretical perspective. Mean-field theory provides a framework to …

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 …

We have observed Bose-Einstein condensation of pairs of fermionic atoms in an ultracold Li
6 gas at magnetic fields above a Feshbach resonance, where no stable Li 2 6 molecules …

We report on the observation of a highly degenerate, strongly interacting Fermi gas of atoms.
Fermionic lithium-6 atoms in an optical trap are evaporatively cooled to degeneracy using a …

We review the BCS to Bose–Einstein condensation (BEC) crossover scenario which is
based on the well known crossover generalization of the BCS ground state wavefunction …

We observe collective oscillations of a trapped, degenerate Fermi gas of Li 6 atoms at a
magnetic field just above a Feshbach resonance, where the two-body physics does not …

We propose to utilize density-density correlations in the image of an expanding gas cloud to
probe complex many-body states of trapped ultracold atoms. In particular, we show how this …

We have produced a macroscopic quantum system in which a 6 Li Fermi sea coexists with a
large and stable 23 Na Bose-Einstein condensate. This was accomplished using …

This paper summarizes the experimental frontier of ultracold fermionic gases. It is based on
three lectures which one of the authors gave at the Varenna Summer School describing the …