Bose-Einstein condensation of 85Rb by direct evaporation in an optical dipole trap

Abstract

We report a simple method for the creation of Bose-Einstein condensates of ${}^{85}$Rb by direct evaporation in a crossed optical dipole trap. The independent control of the trap frequencies and magnetic bias field afforded by the trapping scheme permits full control of the trapped atomic sample, enabling the collision parameters to be easily manipulated to achieve efficient evaporation in the vicinity of the 155 G Feshbach resonance. We produce nearly pure condensates of up to $4\times 10^4$ atoms and demonstrate the tunable nature of the atomic interactions.

5 pages, 4 figures

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Cited by in corpus (6)

• Feshbach resonances in ultracold 85Rb
• Feshbach resonances, molecular bound states and prospects of ultracold molecule formation in mixtures of ultracold K and Cs
• Efficient production of an 87Rb F = 2, mF = 2 Bose-Einstein condensate in a hybrid trap
• Optical runaway evaporation for multi-BEC production
• Repeated output coupling of ultracold Feshbach molecules from a Cs BEC
• Splitting and recombination of bright-solitary-matter waves