Hannover 2013 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster III

Q 56.92: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Two-Photon-Spectroscopy of YbRb - Towards paramagnetic molecules — •Cristian Bruni, Frank Münchow, Maximilian Madalinski, and Axel Görlitz — Institut für Experimentalphysik, HHU Düsseldorf, 40225 Düsseldorf

Ultracold heteronuclear molecules offer fascinating perspectives ranging from ultracold chemistry to novel interactions in quantum gases. Here we report on the spectroscopic investigation of vibrational levels in the electronic ground state of YbRb which is an important step towards the realization of YbRb ground state molecules [1]. Using two-photon photoassociation spectroscopy in laser-cooled mixtures of ⁸⁷Rb and various Yb isotopes we are able to determine the binding energies of weakly-bound vibrational levels and the positions of possible magnetic Feshbach resonances. Recent theoretical work suggest that also in mixtures of alkali and spin-singlet atoms magnetic Feshbach resonances could be experimentally accessible [2]. From additional investigations by means of Autler-Townes spectroscopy we obtain information on the transition rates between vibrational levels of different electronic molecular states.
F. Münchow, C. Bruni, M. Madalinski, and A. Görlitz. Two-photon photoassociation spectroscopy of heteronuclear YbRb. PCCP,13(42):18734 - 18737, (2011).
Piotr S. Zuchowski, J. Aldegunde, and Jeremy M. Hutson. Ultracold RbSr molecules can be formed by magnetoassociation. Phys.Rev. Lett., 105(15):153201, (2010).