Nucleation of Spontaneous Vortices in Trapped Fermi Gases Undergoing a BCS-BEC Crossover

Abstract

We study the spontaneous formation of vortices during the superfluid condensation in a trapped fermionic gas subjected to a rapid thermal quench via evaporative cooling. Our work is based on the numerical solution of the time dependent crossover Ginzburg-Landau equation coupled to the heat diffusion equation. We quantify the evolution of condensate density and vortex length as a function of a crossover phase parameter from BCS to BEC. The more interesting phenomena occur somewhat nearer to the BEC regime and should be experimentally observable; during the propagation of the cold front, the increase in condensate density leads to the formation of supercurrents towards the center of the condensate as well as possible condensate volume oscillations.

5 pages, 3 figures

References in corpus (4)

• Spontaneous vortices in the formation of Bose-Einstein condensates
• Direct Observation of the Superfluid Phase Transition in Ultracold Fermi Gases
• Bose-Einstein Condensation from a Rotating Thermal Cloud: Vortex Nucleation and Lattice Formation
• Generation and Dynamics of Quantized Vortices in a Unitary Fermi Superfluid

Cited by in corpus (5)

• Stable large-scale solver for Ginzburg-Landau equations for superconductors
• Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex Rings and Other Defects
• Detecting vortices in superconductors: Extracting one-dimensional topological singularities from a discretized complex scalar field
• Floquet-Band Engineering of Shaken Bosonic Condensates
• Investigation of 3D-Quantized Ring Vortices in Rotating Coupled Atom-Molecular BEC