Spatial separation in a thermal mixture of ultracold ${}^{174}$Yb and ${}^{87}$Rb atoms

Abstract

We report on the observation of unusually strong interactions in a thermal mixture of ultracold atoms which cause a significant modification of the spatial distribution. A mixture of ${}^{87}$Rb and ${}^{174}$Yb with a temperature of a few $\mu$K is prepared in a hybrid trap consisting of a bichromatic optical potential superimposed on a magnetic trap. For suitable trap parameters and temperatures, a spatial separation of the two species is observed. We infer that the separation is driven by a large interaction strength between ${}^{174}$Yb and ${}^{87}$Rb accompanied by a large three-body recombination rate. Based on this assumption we have developed a diffusion model which reproduces our observations.

References in corpus (3)

• Two-color photoassociation spectroscopy of ytterbium atoms and the precise determinations of s-wave scattering lengths
• Realization of a strongly interacting Bose-Fermi mixture from a two-component Fermi gas
• Adiabatic hyperspherical study of triatomic helium systems

Cited by in corpus (28)

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• Relativistic many-body calculations of van der Waals coefficients for Yb-Li and Yb-Rb dimers
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• Effective microscopic models for sympathetic cooling of atomic gases
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