Journal
PHYSICAL REVIEW LETTERS
Volume 92, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.92.050404
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We investigate the stability of magnetically trapped atomic Bose-Einstein condensates and thermal clouds near the transition temperature at small distances 0.5 mumless than or equal todless than or equal to10 mum from a microfabricated silicon chip. For a 2 mum thick copper film, the trap lifetime is limited by Johnson noise induced currents and falls below 1 s at a distance of 4 mum. A dielectric surface does not adversely affect the sample until the attractive Casimir-Polder potential significantly reduces the trap depth.
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