Phys. Rev. A 66, 041604(R) (2002) [4 pages]Surface effects in magnetic microtraps
We have investigated Bose-Einstein condensates and ultracold atoms in the vicinity of a surface of a magnetic microtrap. The atoms are prepared along copper conductors at distances to the surface between 300μm and 20μm. In this range, the lifetime decreases from 20 s to 0.7 s showing a linear dependence on the distance to the surface. The atoms manifest a weak thermal coupling to the surface, with measured heating rates remaining below 500 nK/s. In addition, we observe a periodic fragmentation of the condensate and thermal clouds when the surface is approached. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.041604
DOI:
10.1103/PhysRevA.66.041604
PACS:
03.75.Fi, 03.75.Be, 34.50.Dy, 75.70.-i
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