Phys. Rev. Lett. 90, 100404 (2003) [4 pages]Bose-Einstein Condensates near a Microfabricated SurfaceReceived 15 November 2002; published 12 March 2003 Magnetically and optically confined Bose-Einstein condensates were studied near a microfabricated surface. Condensate fragmentation observed in microfabricated magnetic traps was not observed in optical dipole traps at the same location. The measured condensate lifetime was ≥20 s and independent of the atom-surface separation under both magnetic and optical confinement. Radio-frequency spin-flip transitions driven by technical noise were directly observed for optically confined condensates and could limit the condensate lifetime in microfabricated magnetic traps. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.100404
DOI:
10.1103/PhysRevLett.90.100404
PACS:
03.75.Nt, 03.75.Be, 34.50.Dy, 39.20.+q
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