We review the concepts and the present state of theoretical studies of spin-imbalanced
superfluidity, in particular the elusive Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state, in the …

Photoassociation of molecules out of an ultracold gas was thefirst successful approach to
create a gas of molecules in the electronic ground state at translational temperatures in the …

The notion of quasi-particles is essential for understanding the behaviour of complex many-
body systems. A prototypical example of a quasi-particle is a polaron, formed by an impurity …

The fastest possible collective response of a quantum many-body system is related to its
excitations at the highest possible energy. In condensed matter systems, the time scale for …

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 …

We investigate the decoherence of K 40 impurities interacting with a three-dimensional
Fermi sea of Li 6 across an interspecies Feshbach resonance. The decoherence is …

We report on the realization of a mixture of fermionic Dy 161 and fermionic K 40 where both
species are deep in the quantum-degenerate regime. Both components are spin polarized …

We analyze the properties of a single impurity immersed in a Fermi sea. At positive energy
and scattering lengths, we show that the system possesses a well-defined but metastable …

We probe the interface between a phase-separated Bose-Fermi mixture consisting of a
small Bose-Einstein condensate of K 41 residing in a large Fermi sea of Li 6. We quantify the …

We investigate ultracold collisions in a novel mixture of Li 6 and Cr 53 fermionic atoms,
discovering more than 50 interspecies Feshbach resonances via loss spectroscopy …