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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 Navez1 — 1Istituto 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.