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MO: Fachverband Molekülphysik

MO 65: Ultracold Molecules II (gemeinsam mit Q)

MO 65.4: Vortrag

Freitag, 23. März 2007, 15:00–15:15, 6J

Experiments with an ultracold ⁶Li-⁴⁰K Fermi-Fermi mixture — •Eric Wille^1,2, Frederik Spiegelhalder¹, Gabriel Kerner¹, Devang Naik¹, Andreas Trenkwalder^1,2, Clarice Aiello^1,2, Raquel Chulia-Jordan¹, Gerhard Hendl¹, Florian Schreck¹, and Rudolf Grimm^1,2 — ¹Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria — ²Institut für Experimentalphysik, Innsbruck, Austria

Degenerate mixtures of the two fermionic species ⁶Li and ⁴⁰K provide a new, intriguing many-body quantum system, which allows to study strongly interacting Fermi gases consisting of atoms with unequal masses. We have recently created our first molecular ⁶Li₂ BEC in a newly build machine. The ⁶Li atoms were loaded into a crossed-beam optical dipole trap realized with a 100 W near-infrared fiber laser. The sample was cooled evaporatively by lowering the laser power by three orders of magnitude within 5 s, leading to quantum degeneracy of ⁶Li₂. To study heteronuclear mixtures, we have simultaneously trapped ⁴⁰K and ⁶Li. We have sympathetically cooled ⁴⁰K with ⁶Li during the evaporation process in the dipole trap. We will present our first investigations on heteronuclear interactions.