0000000000109723

AUTHOR

M. R. Bakhtiari

showing 2 related works from this author

FFLO state in 1-, 2- and 3-dimensional optical lattices combined with a non-uniform background potential

2008

We study the phase diagram of an imbalanced two-component Fermi gas in optical lattices of 1-3 dimensions, considering the possibilities of the FFLO, Sarma/breached pair, BCS and normal states as well as phase separation, at finite and zero temperatures. In particular, phase diagrams with respect to average chemical potential and the chemical potential difference of the two components are considered, because this gives the essential information about the shell structures of phases that will occur in presence of an additional (harmonic) confinement. These phase diagrams in 1, 2 and 3 dimensions show in a striking way the effect of Van Hove singularities on the FFLO state. Although we focus o…

PhysicsSuperconductivityCondensed Matter::Quantum Gaseseducation.field_of_studyStrongly Correlated Electrons (cond-mat.str-el)Condensed matter physicsCondensed Matter - SuperconductivityPopulationFOS: Physical sciencesGeneral Physics and AstronomyHartree01 natural sciences3. Good health010305 fluids & plasmasSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsLattice (order)Condensed Matter::Superconductivity0103 physical sciencesGravitational singularity010306 general physicsFermi gaseducationPhase diagramFermi Gamma-ray Space Telescope
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Fulde-Ferrell-Larkin-Ovchinnikov superfluidity in one-dimensional optical lattices

2007

Spin-polarized attractive Fermi gases in one-dimensional (1D) optical lattices are expected to be remarkably good candidates for the observation of the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) phase. We model these systems with an attractive Hubbard model with population imbalance. By means of the density-matrix renormalization-group method we compute the pairing correlations as well as the static spin and charge structure factors in the whole range from weak to strong coupling. We demonstrate that pairing correlations exhibit quasi-long range order and oscillations at the wave number expected from FFLO theory. However, we also show by numerically computing the mixed spin-charge static struc…

Condensed Matter::Quantum GasesSuperconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated ElectronsStrongly Correlated Electrons (cond-mat.str-el)Condensed Matter - SuperconductivityFOS: Physical sciences
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