Wednesday, June 19, 2013

1306.4266 (Aurel Bulgac et al.)

Quantized Superfluid Vortex Rings in the Unitary Fermi Gas    [PDF]

Aurel Bulgac, Michael McNeil Forbes, Kenneth J. Roche, Gabriel Wlazłowski
We show that quantized vortex rings can be easily excited in trapped fermionic superfluids and argue that the "heavy soliton" observed in a recent experiment comprising superfluid Lithium 6 is a vortex ring. The long oscillation period arises naturally from ring dynamics rather than from an exotic two-hundred-fold increase in the effective mass of the soliton. The nature of the vortex ring and oscillation is elucidated with dynamical simulations of the unitary Fermi Gas within the time-dependent superfluid local density approximation of density functional theory.
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