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Spontaneous Dissociation of Long-Range Feshbach Molecules



T K hler, Eite Tiesinga, Paul S. Julienne


We study the spontaneous dissociation of diatomic molecules produced in cold atomic gases via magnetic field tunable Feshbach resonances. We provide a universal formula for the lifetime of these molecules that relates their decay to the scattering length and the loss rate constant for inelastic spin relaxation collisions. Our universal treatment as well as our exact coupled channels calculations for 85Rb dimers predict a suppression of the decay over several orders of magnitude when the scattering length is increased. Our predictions are in good agreement with recent measurements of the lifetime of 85Rb2.
Physical Review Letters


Feshbach resonance, lifetime, molecule, scattering length, spin relaxation, ultracold gas


K hler, T. , Tiesinga, E. and Julienne, P. (2005), Spontaneous Dissociation of Long-Range Feshbach Molecules, Physical Review Letters (Accessed April 14, 2024)
Created December 31, 2004, Updated October 12, 2021