Understanding the superfluid phase diagram in trapped Fermi gases
Qijin Chen, C. A. Regal, M. Greiner, D. S. Jin, K. Levin
Abstract
Trapped ultracold Fermi gases provide a system that can be tuned between the BCS and BEC regimes by means of a magnetic-field Feshbach resonance. Condensation of fermionic atom pairs in a 40K gas was demonstrated experimentally by a sweep technique that pairwise projects fermionic atoms onto molecules. In this paper we examine previous data obtained with this technique that probed the phase boundary in the temperature-magnetic field plane. Comparison of the 40K data to a theoretically computed phase diagram demonstrates good agreement between the two.
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