Crow instability in unitary Fermi gas
arXiv:1206.1825 · doi:10.1142/S0217984913500978
Abstract
We investigate the initiation and subsequent evolution of Crow instability in an inhomogeneous unitary Fermi gas using zero-temperature Galilei-invariant non-linear Schrödinger equation. Considering a cigar-shaped unitary Fermi gas, we generate the vortex-antivortex pair either by phase-imprinting or by moving a Gaussian obstacle potential. We observe that the Crow instability in a unitary Fermi gas leads to the decay of the vortex-antivortex pair into multiple vortex rings and ultimately into sound waves.
7 pages, 4 figures, Accepted for publication in Mod. Phys. Lett. B (MPLB)
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