Two-dimensional Bose-Einstein condensate in an optical surface trap |
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Authors: | Rychtarik D Engeser B Nägerl H-C Grimm R |
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Affiliation: | Institut für Experimentalphysik, Universit?t Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria. |
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Abstract: | We report on the creation of a two-dimensional Bose-Einstein condensate of cesium atoms in a gravito-optical surface trap. The condensate is produced a few microm above a dielectric surface on an evanescent-wave atom mirror. After evaporative cooling by all-optical means, expansion measurements for the tightly confined vertical motion show energies well below the vibrational energy quantum. The presence of a condensate is observed in two independent ways by a magnetically induced collapse at negative scattering length and by measurements of the horizontal expansion. |
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