Collective modes of a Fermi superfluid containing vortices along the BEC-BCS crossover

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.025601· OSTI ID:20974652

Ghosh, Tarun Kanti; Machida, Kazushige ^[1]

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1. Department of Physics, Okayama University, Okayama 700-8530 (Japan)

Using the coarse-grain averaged hydrodynamic approach, we calculate all low energy transverse excitation spectrum of a rotating Fermi superfluid containing vortex lattices for all regimes along the Bose-Einstein condensate-Bardeen-Cooper-Schrieffer (BEC-BCS) crossover. In the fast rotating regime, the molecular BEC enters into the lowest Landau level, but the superfluid in the unitarity and the BCS regimes occupies many low-lying Landau levels. The difference between the breathing mode frequencies at the BEC and unitarity limit shrinks to zero as the rotation speed approaches the radial trap frequency, in contrast to the finite difference in the nonrotating systems.

• OSTI ID: 20974652
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
COLLECTIVE MODEL
EXCITATION
FERMI GAS
FERMIONS
HYDRODYNAMICS
ROTATION
SPECTRA
SUPERFLUIDITY
TRAPS
VELOCITY
VORTICES