Making Cold Molecules by Time-Dependent Feshbach Resonances
Paul S. Julienne, Eite Tiesinga, T Kohler
Pairs of trapped atoms can be associated to make a diatomic molecule using a time dependentMagnetic field to ramp the energy of a scattering resonance state from above to below the scatteringthreshold. A relatively simple model, parameterized in terms of the background scattering lengthand resonance width and magnetic moment, can be used to predict conversion probabilities fromatoms to molecules. The model and its Landau-Zener interpretation are described and illustrated by specific calculations for 23Na, 87Rb, and 133Cs resonances. The model can be readily adapted to Bose-Einstein condensates. Comparison with full many-body calculations for the condensate case show that the model is very useful for estimating molecule formation probabilities but the modelfails to predict the presence of bursts of hot atoms that may accompany molecule formation.
Journal of Modern Optics
atom trap, Bose-Einstein condensate, cold molecules, feshbach resonance, magnetic field
, Tiesinga, E.
and Kohler, T.
Making Cold Molecules by Time-Dependent Feshbach Resonances, Journal of Modern Optics
(Accessed May 30, 2023)