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MO: Fachverband Molekülphysik

MO 64: Quantum Control II

MO 64.6: Talk

Friday, March 23, 2007, 15:15–15:30, 6F

Optimal Control of Multi-Photon Ionization of Rubidium Molecules in a MOT — •F. Weise¹, S. Birkner¹, A. Merli¹, S. M. Weber¹, F. Sauer¹, L. Wöste¹, A. Lindinger¹, W. Salzmann², T. G. Mullins², J. Eng², M. Albert², R. Wester², and M. Weidemüller² — ¹Freie Universität Berlin — ²Universität Freiburg

In the recent years the processes in ultra-cold atomic ensembles have been extensively studied and many fascinating effects have been discovered. Expanding these investigations to molecules is a further logical step to gain knowledge about fundamental quantum dynamics and is a highly discussed topic in theory [1].

We apply optimal control techniques and shaped femtosecond laser pulses to investigate ultra-cold molecules in a magneto-optical trap [2]. In the presented experiment the multi-photon ionization of rubidium dimers is optimized and the resulting optimal pulse exhibits two frequency bands in the spectrum. Further investigation of those bands provides information about the ionization process and the involved electronic states.

This successful implementation of coherent control on ultra-cold molecules opens the pathway to new prospects.

[1] C.P. Koch, R. Kosloff and F. Masnou-Seeuws, Phys. Rev. A, 73,043409, 2006.

[2] W. Salzmann et. al., Phys. Rev. A, 73, 023414, 2006.