Polarized fermions in the unitarity limit

Andrei Kryjevski; Gautam Rupak; Thomas Schaefer

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arxiv cond-mat/0607834 v2 pith:M43TN5ZK submitted 2006-07-31 cond-mat.other nucl-th

Polarized fermions in the unitarity limit

Gautam Rupak , Thomas Schaefer , Andrei Kryjevski This is my paper

classification cond-mat.other nucl-th

keywords epsilonphasechemicalexpansionlimitorderpolarizedpotential

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We consider a polarized Fermi gas in the unitarity limit. Results are calculated analytically up to next-to-leading order in an expansion about d=4 spatial dimensions. We find a first order transition from superfluid to normal phase. The critical chemical potential asymmetry for this phase transition is delta_mu_c= 2/(mu epsilon)*(1-0.467\epsilon), where epsilon=4-d is the expansion parameter and 'mu' is the average chemical potential of the two fermion species. Stability of the superfluid phase in the presence of supercurrents is also studied.

Polarized fermions in the unitarity limit

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