Shortcut to a Fermi-Degenerate Gas of Molecules via Cooperative Association

Details Shortcut to a Fermi-Degenerate Gas of Molecules via Cooperative Association Shortcut to a Fermi-Degenerate Gas of Molecules via Cooperative Association

2003-04-04

arxiv.org/abs/physics/0304012v2

Phys. Rev. Lett. 91, 210404 (2003).

Physics

Atomic Physics

4 pages, 2 figures, submitted to PRL; v2: expanded intro, added discussion on neglect of collisions and when mimicking should

Scientific paper

10.1103/PhysRevLett.91.210404

We theoretically examine the creation of a Fermi-degenerate gas of molecules via a photoassociation or Feshbach resonance applied to a degenerate Bose-Fermi mixture of atoms. This problem raises an interest because, unlike bosons, fermions in general do not behave cooperatively, so that the collective conversion of, say, two million atoms into one million molecules is not to be expected. Nevertheless, we find that the coupled Fermi system displays collective Rabi-like oscillations and adiabatic passage between atoms and molecules, thereby mimicking Bose-Einstein statistics. Cooperative association of a degenerate mixture of Bose and Fermi gases could therefore serve as a shortcut to a degenerate gas of Fermi molecules.

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