Two-dimensional Bose-Einstein condensate in an optical surface trap

Details Two-dimensional Bose-Einstein condensate in an optical surface trap Two-dimensional Bose-Einstein condensate in an optical surface trap

2003-09-23

arxiv.org/abs/cond-mat/0309536v1

Phys. Rev. Lett. 92, 173003 (2004)

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

10.1103/PhysRevLett.92.173003

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 micrometer 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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