Fermion pairing with spin-density imbalance in an optical lattice
arXiv:cond-mat/0605169 · doi:10.1088/1367-2630/8/9/179
Abstract
We consider pairing in a two-component atomic Fermi gas, in a three-dimensional optical lattice, when the components have unequal densities, i.e. the gas is polarized. We show that a superfluid where the translational symmetry is broken by a finite Cooper pair momentum, namely an FFLO-type state, minimizes the Helmholtz free energy of the system. We demonstrate that such a state is clearly visible in the observable momentum distribution of the atoms, and analyze the dependence of the order parameter and the momentum distribution on the filling fraction and the interaction strength.
18 pages, 17 figures, replaced with published version, also available at http://stacks.iop.org/1367-2630/8/179
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Cited by in corpus (14)
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Exact Numerical Study of Pair Formation with Imbalanced Fermion Populations
- Finite temperature phase diagram of a polarized Fermi gas in an optical lattice
- FFLO state in 1, 2, and 3 dimensional optical lattices combined with a non-uniform background potential
- Finite temperature QMC study of the one-dimensional polarized Fermi gas
- Pair formation and collapse in imbalanced Fermion populations with unequal masses
- Exotic paired states with anisotropic spin-dependent Fermi surfaces
- Superfluid and insulating phases of fermion mixtures in optical lattices
- Collective modes and the speed of sound in the Fulde-Ferrell-Larkin-Ovchinnikov state
- Noise correlations of the ultra-cold Fermi gas in an optical lattice
- FFLO order in ultra-cold atoms in three-dimensional optical lattices
- Magnetic phases of one-dimensional lattices with 2 to 4 fermions per site
- Andreev reflection between a normal metal and the FFLO superconductor II: a self-consistent approach
- Magnetism of quantum dot clusters: A Hubbard model study