Core structure of two-dimensional Fermi gas vortices in the BEC-BCS crossover region

Abstract

We report $T=0$ diffusion Monte Carlo results for the ground-state and vortex excitation of unpolarized spin-1/2 fermions in a two-dimensional disk. We investigate how vortex core structure properties behave over the BEC-BCS crossover. We calculate the vortex excitation energy, density profiles, and vortex core properties related to the current. We find a density suppression at the vortex core on the BCS side of the crossover, and a depleted core on the BEC limit. Size-effect dependencies in the disk geometry were carefully studied.

10 pages, 7 figures

References in corpus (11)

• Many-Body Physics with Ultracold Gases
• Theory of ultracold Fermi gases
• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Strongly paired fermions: Cold atoms and neutron matter
• Observation of a two-dimensional Fermi gas of atoms
• Equation of state of low--density neutron matter and the ${}^1{S}_0$ pairing gap
• Heavy-Light Fermion Mixtures at Unitarity
• Berezinskii-Kosterlitz-Thouless transition in trapped quasi-two-dimensional Fermi gas near a Feshbach resonance
• Pairing effects in the normal phase of a two-dimensional Fermi gas
• Imbalanced Fermi superfluid in a one-dimensional optical potential
• Low-energy potential scattering in two and three dimensions

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