title: Generic phase diagram of Fermion superfluids with population imbalance.
abstract: It is shown by microscopic calculations for trapped imbalanced Fermi superfluids that the gap function always has sign changes, i.e., the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like state, up to a critical imbalance P(c), beyond which normal state becomes stable, at temperature T=0. A temperature-versus-pressure phase diagram is constructed, where the BCS state without sign change is stable only at T not equal to 0. We reproduce the observed bimodality in the density profile to identify its origin and evaluate P(c) as functions of T and the coupling strength. These dependencies match with the recent experiments.
authors.affiliation: Department of Physics, Okayama University, Okayama 700-8530, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Machida
authors.forename: T
authors.initials: T
authors.lastname: Mizushima
authors.forename: M
authors.initials: M
authors.lastname: Ichioka