Universal rate constants for reactive collisions of ultracold molecules

Details Universal rate constants for reactive collisions of ultracold molecules Universal rate constants for reactive collisions of ultracold molecules

2009-12-02

arxiv.org/abs/0912.0370v2

Phys. Rev. Lett. 104, 113202 (2010)

Physics

Atomic Physics

4 pages, 2 figures; v2: final version, accepted for publication in Physical Review Letters

Scientific paper

A simple quantum defect model gives analytic expressions for the complex scattering length and threshold collision rates of ultracold molecules. If the probability of reaction in the short-range part of the collision is high, the model gives universal rate constants for s- and p-wave collisions that are independent of short-range dynamics. This model explains the magnitudes of the recently measured rate constants for collisions of two ultracold 40K87Rb molecules, or an ultracold 40K atom with the 40K87Rb molecule [Ospelkaus et al., Science 327, 853 (2010)].

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