2006/05/31 by T Koponen, T. Koponen, J Kinnunen +7 · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum chaos and dynamical systems #Topological Materials and Phenomena #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1088/1367-2630/8/9/179
published as New J. Phys. 8 (2006) 179 · 18 pages, 17 figures, replaced with published version, also available at http://stacks.iop.org/1367-2630/8/179
openalex publication_date 2006/09/05 · arxiv created 2006/09/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
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 a Fulde–Ferrel–Larkin–Ovchinnikov (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 analyse the dependence of the order parameter and the momentum distribution on the filling fraction and the interaction strength.