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

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

2001-07-31

arxiv.org/abs/physics/0107075v2

Applied Physics B 73, p. 791 - 799 (2001).

Physics

Atomic Physics

10 pages 9 figures, submitted to Appl. Phys. B; v2: Corrected evaporation formulas and some postscript problems

Scientific paper

10.1007/s003400100743

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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