Observation of Feshbach-like resonances in collisions between ultracold molecules

Details Observation of Feshbach-like resonances in collisions between ultracold molecules Observation of Feshbach-like resonances in collisions between ultracold molecules

2004-11-10

arxiv.org/abs/cond-mat/0411258v1

Phys.Rev.Lett.94:123201,2005

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevLett.94.123201

We observe magnetically tuned collision resonances for ultracold Cs2 molecules stored in a CO2-laser trap. By magnetically levitating the molecules against gravity, we precisely measure their magnetic moment. We find an avoided level crossing which allows us to transfer the molecules into another state. In the new state, two Feshbach-like collision resonances show up as strong inelastic loss features. We interpret these resonances as being induced by Cs4 bound states near the molecular scattering continuum. The tunability of the interactions between molecules opens up novel applications such as controlled chemical reactions and synthesis of ultracold complex molecules.

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