Journal
PHYSICAL REVIEW A
Volume 77, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.77.061601
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We report on the production of Cr-52 Bose-Einstein condensates with an all-optical method. We first load 5x10(6) metastable chromium atoms in a one-dimensional (1D) far-off-resonance optical trap (FORT) from a magneto-optical trap, by combining the use of radio-frequency sweeps and depumping toward the S-5(2) state. The atoms are then pumped to the absolute ground state, and transferred into a crossed FORT in which they are evaporated. The fast loading of the 1D FORT (35 ms 1/e time) and the use of relatively fast evaporative ramps allow us to obtain in 20 s about 15 000 atoms in an almost pure condensate.
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