Critical Rotational Frequency for Superfluid Fermionic Gases across a Feshbach Resonance

Abstract

We present a method to determine the critical rotational frequencies for superfluidity of both uniform and trapped Fermi gases across wide Feshbach resonance. It is found that as one approaches the resonance from the BCS side, beyond a critical scattering length, pairing is so robust that superfluidity cannot be destroyed by rotation. Moreover, the critical frequency has a sequence of jumps revealing the appearance of Landau levels, which are particularly prominent for systems up to a few thousand particles. For rotational frequency below an "ultimate" critical frequency, defined to be the lowest frequency at which the center of the cloud goes normal, a trapped gas has a superfluid core surrounded by a normal gas, as seen in recent experiments.

arXiv comment4 pages, 2 figures, published version

References in corpus (3)

• Vortices and Superfluidity in a Strongly Interacting Fermi Gas
• Universal Thermodynamics of Degenerate Quantum Gases in the Unitarity Limit
• Bose-Einstein Condensates with Large Number of Vortices

Cited by in corpus (18)

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• Rapidly Rotating Atomic Gases
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• Superfluid Expansion of a Strongly Interacting Fermi Gas
• Pair-Breaking in Rotating Fermi Gases
• Quantum Hall Transition near a Fermion Feshbach Resonance in a Rotating Trap
• Dark solitons dynamics and snake instability in superfluid Fermi gases trapped by an anisotropic harmonic potential
• Destroying superfluidity by rotating a Fermi gas at unitarity
• Density waves and supersolidity in rapidly rotating atomic Fermi gases
• Rotation induced superfluid-normal phase separation in trapped Fermi gases
• Vortex formation in a rotating two-component Fermi gas
• Breathing modes of a fast rotating Fermi gas
• Two-dimensional fermionic superfluids, pairing instability and vortex liquids in the absence of time reversal symmetry
• Breathing mode frequencies of a rotating Fermi gas in the BCS-BEC crossover region
• General pairing theory for condensed and non-condensed pairs of a superconductor in a high magnetic field
• Pairing of Fermions with Unequal Effective Charges in an Artificial Magnetic Field
• Pseudogap Effects of Fermi Gases in the Presence of A Strong Effective Magnetic Field
• Vortex-lattice structures in rotating Bose-Fermi superfluid mixtures