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 …

An overview of quantum phase transitions (QPTs) in metallic ferromagnets, discussing both
experimental and theoretical aspects, is given. These QPTs can be classified with respect to …

The dynamics of a mobile quantum impurity in a degenerate Fermi system is a fundamental
problem in many-body physics. The interest in this field has been renewed due to recent …

Ultracold Fermi gases with tunable interactions provide a test bed for exploring the many-
body physics of strongly interacting quantum systems,,,. Over the past decade, experiments …

The dynamics of a single impurity in an environment is a fundamental problem in many-body
physics. In the solid state, a well known case is an impurity coupled to a bosonic bath (such …

We employ radio-frequency spectroscopy to investigate a polarized spin mixture of ultracold
Li 6 atoms close to a broad Feshbach scattering resonance. Focusing on the regime of …

We review recent experimental and theoretical progress on ultracold alkaline-earth Fermi
gases with emergent SU (N) symmetry. Emphasis is placed on describing the ground …

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 …

Can a gas of spin-up and spin-down fermions become ferromagnetic because of repulsive
interactions? We addressed this question, for which there is not yet a definitive theoretical …

It is argued that an ultracold quantum degenerate gas of ytterbium 173 Yb atoms having
nuclear spin I= 5/2 exhibits an enlarged SU (6) symmetry. Within the Landau Fermi liquid …