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arXiv · 0709.4554

Feshbach resonances in mixtures of ultracold $^6$Li and $^{87}$Rb gases

B. Deh·C. Marzok·C. Zimmermann·Ph. W. Courteille
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Abstract

We report on the observation of two Feshbach resonances in collisions between ultracold $^6$Li and $^{87}$Rb atoms in their respective hyperfine ground states $|F,m_F>=|1/2,1/2>$ and $|1,1>$. The resonances show up as trap losses for the $^6$Li cloud induced by inelastic Li-Rb-Rb three-body collisions. The magnetic field values where they occur represent important benchmarks for an accurate determination of the interspecies interaction potentials. A broad Feshbach resonance located at 1066.92 G opens interesting prospects for the creation of ultracold heteronuclear molecules. We furthermore observe a strong enhancement of the narrow p-wave Feshbach resonance in collisions of $^6$Li atoms at 158.55 G in the presence of a dense $^{87}$Rb cloud. The effect of the $^{87}$Rb cloud is to introduce Li-Li-Rb three-body collisions occurring at a higher rate than Li-Li-Li collisions.

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B. Deh, C. Marzok, C. Zimmermann, Ph. W. Courteille. 2007-12-14. Feshbach resonances in mixtures of ultracold $^6$Li and $^{87}$Rb gases. https://doi.org/10.1103/physreva.77.010701

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