2006/10/31 by G. Orso · 1 citation
Physics and Astronomy · #cond-mat.other #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.98.070402
published as Physical Review Letters 98, 070402 (2007) · Final accepted version
arxiv created 2007/02/22 · arxiv updated 2015/06/25
We investigate two-component attractive Fermi gases with imbalanced spin populations in trapped one dimensional configurations. The ground state properties are determined within local density approximation, starting from the exact Bethe-ansatz equations for the homogeneous case. We predict that the atoms are distributed according to a two-shell structure: a partially polarized phase in the center of the trap and either a fully paired or a fully polarized phase in the wings. The partially polarized core is expected to be a superfluid of the FFLO type. The size of the cloud as well as the critical spin polarization needed to suppress the fully paired shell, are calculated as a function of the coupling strength.