The physics of quantum degenerate atomic Fermi gases in uniform as well as in
harmonically trapped configurations is reviewed from a theoretical perspective. Emphasis is …

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 …

Superconductivity and magnetism generally do not coexist. Changing the relative number of
up and down spin electrons disrupts the basic mechanism of superconductivity, where …

The Fulde–Ferrell–Larkin–Ovchinnikov (FFLO) state is a novel superconducting state in a
strong magnetic field characterized by the formation of Cooper pairs with nonzero total …

We established superfluidity in a two-state mixture of ultracold fermionic atoms with
imbalanced state populations. This study relates to the long-standing debate about the …

We present a theoretical interpretation of a recent experiment presented by Zwierlein
[Nature (London) 442, 54 (2006)] on the density profile of Fermi gases with unbalanced spin …

We report the realization of a novel degenerate Fermi mixture with an SU (2)× SU (6)
symmetry in a cold atomic gas. We successfully cool the mixture of the two fermionic …

We have observed phase separation between the superfluid and the normal component in a
strongly interacting Fermi gas with imbalanced spin populations. The in situ distribution of …

Phase transitions are dramatic phenomena: water freezes into ice, atomic spins
spontaneously align in a magnet, and liquid helium becomes superfluid. Sometimes, such a …

Recent experiments with ultra-cold atoms have demonstrated the possibility of realizing
fermionic superfluids with imbalanced spin populations experimentally. We discuss how …