30 research outputs found
Exotic superfluidity in cold atoms
We derived the low energy effective action for the collective modes in
asymmetric fermionic systems with attractive interaction. We obtained the phase
diagram in terms of the chemical potentials. It features a stable gapless
superfluidity with one Fermi surface on the BEC side of the resonance. Also we
predict a sharp increase in outer core of a vortex, i.e. vortex size, upon
entering into the gapless phase. This may serve as a signature of a gapless
phase.Comment: 12 pages, 6 figures, proceedings of the conference "Shifmania,
Crossing the Boundaries: Gauge Dynamics at Strong Coupling", May 14-17, 200