Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 36: Ultracold Molecules

Q 36.2: Vortrag

Dienstag, 6. März 2018, 14:15–14:30, K 2.013

Reaction kinetics in ultracold molecule-molecule collisions — •Daniel Hoffmann, Thomas Paintner, Wolfgang Limmer, and Johannes Hecker Denschlag — Institut für Quantenmaterie, Universität Ulm, Deutschland

We study the dissociation of ultracold molecules of fermionic ⁶Li atoms in cold molecular collisions. For this we prepare an almost pure gas of Feshbach dimers (BEC regime) in a single internal quantum state and trigger the dynamics by slightly increasing the temperature of the molecular ensemble. The dissociation dynamics are measured by counting the number of unpaired atoms as a function of time. Fitting a model to the data allows us to extract the reaction rate constant of the dissociation. Furthermore, we determine how the dissociation rate constant depends on the temperature and interaction strength and find a strong scaling behavior for both quantities.