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Bonn 2000 – scientific programme

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Q: Quantenoptik

Q 41: Poster: Fallen und Kühlung

Q 41.13: Poster

Thursday, April 6, 2000, 16:30–19:30, Aula

A single molecule in a Bose-Einstein condensate — •Martin Wilkens2 and Patrick Navez11Istituto Nazionale di Fisica della Materia, Università di Milano, Via Celoria 16, 20133 Milano, Italy — 2Institut für Physik, Universität Potsdam, 14469 Potsdam, Germany

We study the interaction of a linear rod molecule with a Bose-Einstein condensate. A generalization of the Landau criterion is established. In particular, we show that under favorable conditions, the rotational energy released by the molecule is large enough to eject one atom out of the condensate. The detection of such an atom provides a direct measure of the low-energy cross section of the scattering with the rotating molecule. Also, the increase of the moment of inertia and of centrifugal distortion of the molecule due to the surrounding condensate are estimated and are compared with experimental data of quantum degenerate 4He droplets.
P. Navez and M. Wilkens, J. Phys. B32 (1999) L629.

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