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Atom loss from the 85Rb Bose-Einstein condensate by a Feshbach resonance

V. A. Yurovsky, A. Ben-Reuven

cond-mat.softarXiv:cond-mat/0308448

Abstract

Loss of atoms from a 85Rb condensate on passage through a Feshbach resonance is analyzed using the generalized parametric approximation that takes into account quantum many-body effects. These effects lead to a substantial increase of the losses. A better agreement with experiments is achieved, compared to predictions of mean-field theories. The method provides much insight into the quantum effects involved, and on the nature of entangled atom pairs produced by the loss.

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