Physics – Atomic Physics
Scientific paper
2006-08-07
Phys. Rev. Lett. 98, 063201 (2007)
Physics
Atomic Physics
4 pages, 4 figures, published in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.98.063201
We report on the first measurement of a temperature dependence of the Casimir-Polder force. This measurement was obtained by positioning a nearly pure 87-Rb 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 spatial variations in the surface-atom force. In our experiment, the dielectric substrate is heated up to 605 K, while the surrounding environment is kept near room temperature (310 K). The effect of the Casimir-Polder force is measured to be nearly 3 times larger for a 605 K substrate than for a room-temperature substrate, showing a clear temperature dependence in agreement with theory.
Antezza Mauro
Cornell Eric A.
Obrecht J. M.
Pitaevskii Lev P.
Stringari Sandro
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