Abstract

We analyze the ground-state phases of two-component (sigma equivalent toup arrow,down arrow) population- and mass-balanced (N-up arrow=N-down arrow and m(up arrow)=m(down arrow)) but trap-imbalanced (omega(up arrow)not equal omega(down arrow)) fermion mixtures as a function of interaction strength from the weak attraction Bardeen-Cooper-Schrieffer (BCS) to the strong attraction Bose-Einstein condensation (BEC) limit. In the BCS limit, we find that the unpolarized superfluid (UPS) fermions exist away from the central core of the trapping potentials, and are surrounded by partially sigma-polarized normal (P sigma PN) fermions. As the interactions increase towards unitarity, we find that the central P sigma PN core first transitions to a UPS, and then expands towards the edges until the entire mixture becomes a UPS in the BEC limit.

Publication Details
Publication Type
Journal Article
Year of Publication
2008
Volume
77
DOI
10.1103/PhysRevA.77.013605
Journal
Physical Review A
Contributors