Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold atoms, ions and BEC

A 40.31: Poster

Thursday, March 15, 2012, 16:30–19:00, Poster.V

Collisions of ultracold Rb₂ triplet molecules — •Markus Deiss, Björn Drews, Manuel Thoma, Benjamin Deissler, and Johannes Hecker Denschlag — Institut für Quantenmaterie, Universität Ulm, Albert-Einstein-Allee 45, 89081 Ulm, Germany

In recent years it has become possible to prepare ultracold and dense molecular samples in the rovibrational ground state which opens the door for novel experiments [1,2,3]. Here, we report on our current status concerning collisions between ultracold Rb₂ triplet molecules. Starting with a BEC of ⁸⁷Rb atoms, we use a magnetic Feshbach resonance at 1007.4G to produce a pure sample of molecules which are held in a 3D optical lattice and transferred to the rovibrational ground state by STIRAP. One question of interest is how quickly these triplet molecules relax into a singlet state.

[1] F. Lang et. al., Phys. Rev. Lett. 101, 133005 (2008)

[2] J. G. Danzl et. al., Nature Physics 6, 265 (2010)

[3] K.-K. Ni et. al., Science 322, 231 (2008)