Hannover 2010 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 28: Poster: Cold Molecules

MO 28.4: Poster

Donnerstag, 11. März 2010, 16:00–18:30, Lichthof

Optoelectrical Cooling of Polar Molecules — •Barbara G.U. Englert1, Martin Zeppenfeld1, Manuel Mielenz1, Christian Sommer1, Josef Bayerl1, Michael Motsch1, Pepijn W.H. Pinkse1,2, and Gerhard Rempe11Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 2Mesa + Institute for Nanotechnology, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands

We present progress towards the experimental realization of optoelectrical cooling [1] which is widely applicable for producing samples of ultracold (<1 mK) polar molecules. This scheme exploits the interaction between trapped molecules and electric fields to remove energy, while a spontaneous vibrational decay removes entropy. The trap, a key element of this method, must not only provide long lifetimes, but also regions of variable homogenous electric fields, allowing the required addressing of transitions between individual rotational sublevels. We consider in detail the design of this microstructured electrical trap, where a trap depth of 1 K can be achieved. Careful patterning of the electrodes allows a suppression of trap losses by Majorana flips.

[1] M. Zeppenfeld et al., Phys. Rev. A 80, 041401(R) (2009).

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