Population imbalanced superfluidity in ultracold atomic Fermi systems in the BEC limit (Skype Talk)

Ultracold atomic Fermi systems present unique opportunity to explore
exotic superfluid states.One such scenario is survival of
superfluidity under population imbalance of its pairing
constituents. In this talk, population imbalanced two-component Fermi
system under harmonic confinement (trap) in the BEC regime of
interaction is discussed. In this regime Sarma phase or polarized
superfluid is stable where excess fermions occupy negative
quisiparticle energy states. The system exhibit shell structure:
unpolarized superfluid -> polarized superfluid ->normal
state. Furthermore it is shown that using two different trap
frequencies, shell radii can be tuned eventually forming polarized
superfluid core at experimentally feasible polarization.

Reference: PRA 81, 013623 (2010)