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 …

A central challenge in modern condensed matter physics is develo** the tools for
understanding nontrivial yet unordered states of matter. One important idea to emerge in this …

Ferromagnetism is a manifestation of strong repulsive interactions between itinerant
fermions in condensed matter. Whether short-ranged repulsion alone is sufficient to stabilize …

Many-body quantum systems can exhibit a striking degree of symmetry unparallelled in their
classical counterparts. In real materials SU (N) symmetry is an idealization, but this …

We investigate the excitation spectrum and compressibility of a dipolar Bose-Einstein
condensate in an infinite tube potential in the parameter regime where the transition …

We characterize the Mott insulating regime of a repulsively interacting Fermi gas of ultracold
atoms in a three-dimensional optical lattice. We use in situ imaging to extract the central …

We report the creation and the study of the stability of a repulsive quasihomogeneous spin-
1/2 Fermi gas with contact interactions. For the range of scattering lengths a explored, the …

We observe that the diffusive spin current in a strongly interacting degenerate Fermi gas of K
40 precesses about the local magnetization. As predicted by Leggett and Rice, precession is …

We report on the observation of a high-density, band insulating state in a three-dimensional
optical lattice clock. Filled with a nuclear-spin-polarized degenerate Fermi gas of Sr 87, the …

Using continuous-space quantum Monte Carlo methods, we investigate the zero-
temperature ferromagnetic behavior of a two-component repulsive Fermi gas under the …