1206.1825 (S. Gautam)

Crow instability in unitary Fermi gas    [PDF]

S. Gautam

We investigate the generation and subsequent evolution of Crow instability in an inhomogeneous unitary Fermi gas using zero-temperature Galilei-invariant non-linear Schr\"odinger 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 unitary Fermi leads to the decay of the vortex antivortex pair in multiple vortex rings and ultimately into sound waves.

View original: http://arxiv.org/abs/1206.1825