Exotic superfluidity in cold atoms

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Gubankova, Elena
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Abstract
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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, 2009
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Condensed Matter - Quantum Gases
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