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MO: Molekülphysik
MO 52: Cold molecules I
MO 52.1: Fachvortrag
Donnerstag, 16. März 2006, 10:40–11:10, H10
Water vapor at one kelvin — •P.W.H. Pinkse1, T. Rieger1, T. Junglen1, S.A. Rangwala1, G. Rempe1, and J. Bulthuis2 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching. — 2Department of Physical Chemistry and Laser Centre, Vrije Universiteit, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands
Cold dilute molecular systems are an emerging front line at the interface of quantum optics and condensed matter physics. Cold gases of dipolar molecules can be produced by forging a tight bond between two chemically distinct species of laser-cooled atoms. Alternatively, cold gas ensembles can be created by buffer gas loading or electric field manipulation of naturally occurring molecules. However, so far all the cold molecules produced in this manner have a Stark effect which is predominantly linear in the experimentally relevant electric-field range of 0-150 kV/cm.
We report the creation of a confined slow beam of heavy-water (D2O) molecules with a translational temperature around 1 kelvin. This is achieved by filtering slow D2O with inhomogeneous electrostatic fields acting on the purely quadratic Stark shift of D2O. Further, on the basis of elementary molecular properties and understanding of our filter technique [1] we predict that in the resulting slow molecular beam of D2O only a few molecular ro-vibrational states are significantly populated. [2]
[1] T. Junglen, et al., Eur. Phys. J. D 31, 365 (2004).
[2] T. Rieger, et al., arXiv/physics 0512119 (2005).