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Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 17: Fermi Quantum Gas

Q 17.7: Talk

Tuesday, March 15, 2011, 12:00–12:15, BAR Schön

Radio-Frequency Association of Efimov Trimers — •Thomas Lompe1,2,3, Timo Ottenstein1,2,3, Friedhelm Serwane1,2,3, Andre Wenz1,2, Gerhard Zürn1,2 und Selim Jochim1,2,31Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Germany — 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 3ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany

Since the first signatures of Efimov states were found in the rate of inelastic collisions of an ultracold atomic gas, such systems have been used to study Efimov physics with great success. However, until recently experiments have been limited to observations of the crossings of Efimov states with the continuum. In this talk we report on the first direct observation of an Efimov state with RF association spectroscopy. We have measured the binding energy of this Efimov state as a function of interaction strength and found good agreement with theoretical predictions. This work opens the door for both precision studies and coherent manipulation of Efimov trimers.

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