J M Obrecht

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We report on the first measurement of a temperature dependence of the Casimir-Polder force. This measurement was obtained by positioning a nearly pure 87Rb Bose-Einstein condensate a few microns from a dielectric substrate and exciting its dipole oscillation. Changes in the collective oscillation frequency of the magnetically trapped atoms result from(More)
We have measured magnetic trap lifetimes of ultra-cold 87 Rb atoms at distances of 5-1000 µm from surfaces of conducting metals with varying resis-tivity. Good agreement is found with a theoretical model for losses arising from near-field magnetic thermal noise, confirming the complications associated with holding trapped atoms close to conducting surfaces.(More)
We have measured magnetic trap lifetimes of ultra-cold 87 Rb atoms at distances of 5-1000 µm from surfaces of conducting metals with varying resis-tivity. Good agreement is found with a theoretical model for losses arising from near-field magnetic thermal noise, confirming the complications associated with holding trapped atoms close to conducting surfaces.(More)
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