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Mixture of ultracold lithium and cesium atoms in an optical dipole trap

A. Mosk·S. Kraft·M. Mudrich·K. Singer·W. Wohlleben·R. Grimm·M. Weidemuller
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Abstract

We present the first simultaneous trapping of two different ultracold atomic species in a conservative trap. Lithium and cesium atoms are stored in an optical dipole trap formed by the focus of a CO$_2$ laser. Techniques for loading both species of atoms are discussed and observations of elastic and inelastic collisions between the two species are presented. A model for sympathetic cooling of two species with strongly different mass in the presence of slow evaporation is developed. From the observed Cs-induced evaporation of Li atoms we estimate a cross section for cold elastic Li-Cs collisions.

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A. Mosk, S. Kraft, M. Mudrich, K. Singer, W. Wohlleben, R. Grimm, M. Weidemuller. 2001-10-31. Mixture of ultracold lithium and cesium atoms in an optical dipole trap. https://doi.org/10.1007/s003400100743

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