Abstract
We report the achievement of Bose–Einstein condensation of a dilute atomic gas based on trapping atoms in tightly confining CO2-laser dipole potentials. Quantum degeneracy of rubidium atoms is reached by direct evaporative cooling in both crossed- and single-beam trapping geometries. At the heart of these all-optical condensation experiments is the ability to obtain high initial atomic densities in quasi-static dipole traps by laser-cooling techniques. Finally, we demonstrate the formation of a condensate in a field-insensitive mF=0 spin projection only, which suppresses fluctuations of the chemical potential from stray magnetic fields.
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03.75.Fi; 32.80.Pj; 42.50.Yk
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Cennini, G., Ritt, G., Geckeler, C. et al. Bose–Einstein condensation in a CO2-laser optical dipole trap. Appl. Phys. B 77, 773–779 (2003). https://doi.org/10.1007/s00340-003-1333-1
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DOI: https://doi.org/10.1007/s00340-003-1333-1