Fermion pairing with spin-density imbalance in an optical lattice

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dc.creatorKoponen, T.
dc.creatorKinnunen, J.
dc.creatorMartikainen, J. -P.
dc.creatorJensen, L. M.
dc.creatorTorma, P.
dc.date2006-05-07
dc.date2006-09-06
dc.date.accessioned2026-07-07T07:08:48Z
dc.date.available2026-07-07T07:08:48Z
dc.descriptionWe 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.
dc.description18 pages, 17 figures, replaced with published version, also available at http://stacks.iop.org/1367-2630/8/179
dc.identifierhttps://arxiv.org/abs/cond-mat/0605169
dc.identifierhttp://arxiv.org/abs/cond-mat/0605169
dc.identifierNew J. Phys. 8 (2006) 179
dc.identifierdoi:10.1088/1367-2630/8/9/179
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/110840
dc.subjectSuperconductivity
dc.subjectMaterials Science
dc.titleFermion pairing with spin-density imbalance in an optical lattice
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