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We report a simple method for the creation of Bose-Einstein condensates of$^{85}$Rb by direct evaporation in a crossed optical dipole trap. Theindependent control of the trap frequencies and magnetic bias field afforded bythe trapping scheme permits full control of the trapped atomic sample, enablingthe collision parameters to be easily manipulated to achieve efficientevaporation in the vicinity of the 155 G Feshbach resonance. We produce nearlypure condensates of up to $4\times10^4$ atoms and demonstrate the tunablenature of the atomic interactions.

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