Hamburg 2009 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 26: Quantengase: Fermionen
Q 26.5: Vortrag
Dienstag, 3. März 2009, 17:30–17:45, VMP 6 HS-A
Stability of the three-component 6Li40K Fermi mixture with a single resonant interaction — •Andreas Trenkwalder1, Frederik Spiegelhalder1, Eric Wille1, Devang Naik1, Gerhard Hendl1, Florian Schreck1, and Rudolf Grimm1,2 — 1Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria — 2Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, Innsbruck, Austria
We report on the stability of a strongly interacting 6Li two-component mixture in presence of weakly interacting 40K. The sample consists of 6Li in the two lowest spin states and 40K in the ground state held in an optical dipole trap. The temperature of 40K is close to the Fermi temperature, 6Li is degenerate. We measure loss rate coefficients of this mixture for different magnetic fields around the 834 Gauss 6Li Feshbach resonance. Despite the mixture consisting of three distinguishable particles, we observe stability against three-body recombination. On the resonance as well as on the BCS side the mixture is very stable. On the molecular side losses increase due to atom-dimer collisions. The stability around the Feshbach resonance will allow to use 40K as a probe for the BEC-BCS crossover of 6Li.