Feshbach-resonant interactions in K-40 and Li-6 degenerate Fermi gases



: Mackie M, Piilo J

Publisher: AMERICAN PHYSICAL SOC

: 2005

: Physical Review Letters

: PHYSICAL REVIEW LETTERS

: PHYS REV LETT

: ARTN 060403

: 94

: 6

: 4

: 0031-9007

DOI: https://doi.org/10.1103/PhysRevLett.94.060403


We theoretically examine a system of Fermi degenerate atoms coupled to bosonic molecules by a Feshbach resonance, focusing on the superfluid transition to a molecular Bose-Einstein condensate dressed by Cooper pairs of atoms. This problem raises interest because it is unclear at present whether bimodal density distributions observed recently in K-40 and Li-6 are due to a condensate of bosonic molecules or fermionic atom pairs. As opposed to K-40, we find that any measurable fraction of above-threshold bosonic molecules is necessarily absent for the Li-6 system in question, which strongly implicates Cooper pairs as the culprit behind its bimodal distributions.



Last updated on 2024-26-11 at 14:39