Rotational Feshbach Resonances in Ultracold Molecular Collisions

Details Rotational Feshbach Resonances in Ultracold Molecular Collisions Rotational Feshbach Resonances in Ultracold Molecular Collisions

2002-05-08

arxiv.org/abs/physics/0205020v1

Physics

Atomic Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.89.203202

In collisions at ultralow temperatures, molecules will possess Feshbach resonances, foreign to ultracold atoms, whose virtual excited states consist of rotations of the molecules. We estimate the mean spacing and mean widths of these resonant states, exploiting the fact the molecular collisions at low energy display chaotic motion. As examples, we consider the experimentally relevant molecules O_2, OH, and PbO. The density of s-wave resonant states for these species is quite high, implying that a large number of narrow resonant states will exist.

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