TY - JOUR
T1 - Atom loss and the formation of a molecular Bose-Einstein condensate by Feshbach resonance
AU - Yurovsky, V. A.
AU - Ben-Reuven, A.
AU - Julienne, P. S.
AU - Williams, C. J.
PY - 2000/10
Y1 - 2000/10
N2 - This paper discusses the two types of loss experiments conducted at MIT on sodium Bose-Einstein condensate, using a time-varying magnetic field in the proximity of a Feshbach resonance. The various processes discussed here involve a temporary formation of a molecular condensate. In the slow-sleep experiment the dominant loss mechanism is three-body deactivation by atom-molecule inelastic collisions. A best fit of an analytical expression for the atomic density obtained here to the MIT data yields a rate coefficient for deactivating atom-molecule collisions of 1.6 × 10-10 cm3/s. For the fast-sweep experiment an analytical expression, generalizing the Landau-Zener formula to a case of coupled nonlinear equations, is obtained. The combined effect of the two mechanisms is studied here, including molecule-molecule deactivating collisions.
AB - This paper discusses the two types of loss experiments conducted at MIT on sodium Bose-Einstein condensate, using a time-varying magnetic field in the proximity of a Feshbach resonance. The various processes discussed here involve a temporary formation of a molecular condensate. In the slow-sleep experiment the dominant loss mechanism is three-body deactivation by atom-molecule inelastic collisions. A best fit of an analytical expression for the atomic density obtained here to the MIT data yields a rate coefficient for deactivating atom-molecule collisions of 1.6 × 10-10 cm3/s. For the fast-sweep experiment an analytical expression, generalizing the Landau-Zener formula to a case of coupled nonlinear equations, is obtained. The combined effect of the two mechanisms is studied here, including molecule-molecule deactivating collisions.
UR - http://www.scopus.com/inward/record.url?scp=0034298193&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.62.043605
DO - 10.1103/PhysRevA.62.043605
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AN - SCOPUS:0034298193
SN - 1050-2947
VL - 62
SP - 43605
EP - 43601
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 4
ER -