Mean-Field Theory of Feshbach-Resonant Interactions in 85Rb Condensates

Details Mean-Field Theory of Feshbach-Resonant Interactions in 85Rb Condensates Mean-Field Theory of Feshbach-Resonant Interactions in 85Rb Condensates

2002-05-26

arxiv.org/abs/cond-mat/0205535v2

Phys. Rev. Lett. 89, 180403 (2002).

Physics

Condensed Matter

Soft Condensed Matter

v2: numbers changed, not conclusions; 5 pages, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.89.180403

Recent Feshbach-resonance experiments with 85Rb Bose-Einstein condensates have led to a host of unexplained results: dramatic losses of condensate atoms for an across-resonance sweep of the magnetic field, a collapsing condensate with a burst of atoms emanating from the remnant condensate, increased losses for decreasing interaction times-- until short times are reached, and seemingly coherent oscillations between remnant and burst atoms. Using a simple yet realistic mean-field model, we find that rogue dissociation, molecular dissociation to noncondensate atom pairs, is strongly implicated as the physical mechanism responsible for these observations.

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