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arXiv · 0712.3521

All-Optical Production of Chromium Bose-Einstein Condensates

Q. Beaufils·R. Chicireanu·T. Zanon·B. Laburthe-Tolra·E. Marechal·L. Vernac·J. -C. Keller·O. Gorceix
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Abstract

We report on the production of ^52Cr Bose Einstein Condensates (BEC) with an all-optical method. We first load 5.10^6 metastable chromium atoms in a 1D far-off-resonance optical trap (FORT) from a Magneto Optical Trap (MOT), by combining the use of Radio Frequency (RF) frequency sweeps and depumping towards the ^5S_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 15000 atoms in an almost pure condensate.

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Q. Beaufils, R. Chicireanu, T. Zanon, B. Laburthe-Tolra, E. Marechal, L. Vernac, J. -C. Keller, O. Gorceix. 2008-09-29. All-Optical Production of Chromium Bose-Einstein Condensates. https://doi.org/10.1103/physreva.77.061601

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