Surface Effects in Magnetic Microtraps

Details Surface Effects in Magnetic Microtraps Surface Effects in Magnetic Microtraps

2002-05-15

arxiv.org/abs/cond-mat/0205310v3

Phys. Rev. A 66, 041604(R) (2002)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 4 figures; v2: corrected references; v3: final version

Scientific paper

10.1103/PhysRevA.66.041604

We have investigated Bose-Einstein condensates and ultra cold atoms in the vicinity of a surface of a magnetic microtrap. The atoms are prepared along copper conductors at distances to the surface between 300 um and 20 um. 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.

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