Phys. Rev. Lett. 87, 010404 (2001) [4 pages]All-Optical Formation of an Atomic Bose-Einstein Condensate
We have created a Bose-Einstein condensate (BEC) of 87Rb atoms directly in an optical trap. We employ a quasielectrostatic dipole force trap formed by two crossed CO2 laser beams. Loading directly from a sub-Doppler laser-cooled cloud of atoms results in initial phase space densities of ∼1/200. Evaporatively cooling through the BEC transition is achieved by lowering the power in the trapping beams over ∼2s. The resulting condensates are F = 1 spinors with 3.5×104 atoms distributed between the mF = (-1,0,1) states. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.010404
DOI:
10.1103/PhysRevLett.87.010404
PACS:
03.75.Fi, 03.67.-a, 32.80.Pj
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