Berezinskii-Kosterlitz-Thouless transition in trapped quasi-two-dimensional Fermi gas near a Feshbach resonance

Abstract

We study the superfluid transition in a quasi-two-dimensional Fermi gas with a magnetic field tuning through a Feshbach resonance. Using an effective two-dimensional Hamiltonian with renormalized interaction between atoms and dressed molecules, we investigate the Berezinskii-Kosterlitz-Thouless transition temperature by studying the phase fluctuation effect. We also take into account the trapping potential in the radial plane, and discuss the number and superfluid density distributions. These results can be compared to experimental outcomes for gases prepared in one-dimensional optical lattices.

6 pages, 4 figures

References in corpus (7)

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• Weakly bound dimers of fermionic atoms
• Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
• Molecules of Fermionic Atoms in an Optical Lattice
• BCS-BEC Crossover of a Quasi-two-dimensional Fermi Gas: the Significance of Dressed Molecules
• Conditions of Low Dimensionality for Strongly Interacting Atoms Under a Transverse Trap
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Cited by in corpus (8)

• Radiofrequency spectroscopy of a strongly interacting two-dimensional Fermi gas
• Crossover from 2D to 3D in a weakly interacting Fermi gas
• Spin-Imbalanced Quasi-Two-Dimensional Fermi Gases
• Exact few-body results for strongly correlated quantum gases in two dimensions
• The effect of population imbalance on the Berezinskii-Kosterlitz-Thouless phase transition in a superfluid Fermi gas
• Effective-range dependence of two-dimensional Fermi gases
• Kosterlitz-Thouless transition and vortex-antivortex lattice melting in two-dimensional Fermi gases with $p$- or $d$-wave pairing
• Significance of dressed molecules in a quasi-two-dimensional polarized Fermi gas