Density fingerprint of giant vortices in Fermi gases near a Feshbach resonance

Abstract

The structure of multiply quantized or giant vortex states in atomic Fermi gases across a Feshbach resonance is studied within the context of self-consistent Bogoliubov-de Gennes theory. The particle density profile of vortices with $\kappa >1$ flux quanta is calculated. Owing to $\kappa$ discrete branches of vortex core bound states, inside the core the density oscillates as a function of the distance from the vortex line and displays a non-monotoic dependence on the interaction strengths, in marked contrast to the singly quantized case, in which the density depletes monotonically. This feature, never reported so far, can make a direct visualization of the giant vortices in atomic Fermi gases.

arXiv comment4 pages and 5 figures; Published version in PRA

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• Magnetization profile and core level spectroscopy in a multiply quantized vortex of imbalanced Fermi superfluids
• Vortex-lattice structures in rotating Bose-Fermi superfluid mixtures