Asymmetric two-component Fermi gas with unequal masses

Details Asymmetric two-component Fermi gas with unequal masses Asymmetric two-component Fermi gas with unequal masses

2006-06-23

arxiv.org/abs/cond-mat/0606624v2

Physics

Condensed Matter

Superconductivity

4 pages and 4 figures

Scientific paper

We analyze the zero temperature phase diagram for an asymmetric two-component Fermi gas as a function of mass anisotropy and population imbalance. We identify regions corresponding to normal, or uniform/non-uniform superfluid phases, and discuss topological quantum phase transitions in the Bardeen-Cooper-Schrieffer (BCS), unitarity and Bose-Einstein condensation (BEC) limits. Lastly, we derive the zero temperature low frequency and long wavelength collective excitation spectrum, and recover the Bogoliubov relation for weakly interacting dilute bosons in the BEC limit.

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