Thursday, June 6, 2013

1306.0960 (J. Jiang et al.)

A simple and efficient all-optical production of spinor condensates    [PDF]

J. Jiang, L. Zhao, M. Webb, N. Jiang, H. Yang, Y. Liu
We present a simple and optimal experimental scheme for an all-optical production of a sodium spinor Bose-Einstein condensate (BEC). With this scheme, we demonstrate that the number of atoms in a pure BEC can be greatly boosted by a factor of 5 in a simple setup that includes a single-beam optical trap or a crossed optical trap. This optimal scheme avoids technical challenges associated with some all-optical BEC methods, and can be applied to other optically trappable atomic species. In addition, we find a good agreement between our theoretical model and data. The upper limit for the efficiency of evaporative cooling in all-optical BEC approaches is also discussed.
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