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MO: Fachverband Molekülphysik

MO 22: Cold Molecules 3

MO 22.3: Vortrag

Freitag, 21. März 2014, 11:00–11:15, BEBEL SR144

Ultracold collisions of a³Σ_u⁺ molecules — •Björn Drews, Markus Deiss, Benjamin Deissler, and Johannes Hecker Denschlag — Institut für Quantenmaterie, Universität Ulm

We prepare a sample of ultracold ⁸⁷Rb₂ molecules in the a³Σ_u rovibrational ground state in a three dimensional optical lattice. Starting from there we allow interaction in one (cigar-shaped trap) or two (pancake trap) directions. Fast inelastic two-body-collision losses are expected due to the energetically lower-lying x¹Σ_g potential. The observed lifetimes are on timescales ranging from a few up to hundreds of milliseconds and we see a dependency on the trap depth and on the external magnetic field.

With the ability to change the internal state of the molecule as well as the surrounding fields these experiments present a testing ground for ultracold chemistry. Data over a wide range of different experimental parameters will be shown as well as their placement in a theoretical background.