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Hamburg 2009 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 6: Ultrakalte Moleküle (mit MO)

Q 6.4: Talk

Monday, March 2, 2009, 11:30–11:45, VMP 8 HS

Formation of dipolar molecules in the absolute groundstate — •Johannes Deiglmayr1,2, Anna Grochola1, Marc Repp3, Olivier Dulieu2, Roland Wester1, and Matthias Weidemüller31Physikalisches Institut, Albert-Ludwigs-Universität Freiburg — 2Laboratoire Aimé Cotton, CNRS, Orsay, France — 3Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg

Dipolar molecules in the absolute ground state are promising candidates for the exploration of quantum phases in dipolar gases, the control of ultracold chemical reaction, and a wide range of further systems [1]. In this talk we will report on the formation of ultracold LiCs molecules in the rovibrational ground state X1Σ+,v″=0,J″=0 [2] using photoassociation (PA). The formed molecules are detected in a setup combining resonant-enhanced multi-photon ionization and a high resolution time-of-flight mass spectrometer. Additionally, we employ depletion spectroscopy to determine the rotational state of the formed molecules and to measure the dipole moment of the ground state molecules by Stark spectroscopy. Combining the results of PA and depletion spectroscopy, we also improve the value of the dissociation energy for the X1Σ+ ground state.
[1] O. Dulieu, M. Raoult, and E. Tiemann, E., Introductory review, Special Issue on cold molecules, J. Phys. B 39, (2006)

[2] J. Deiglmayr et al., PRL 101, 133004 (2008)

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