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Measurement of the Temperature Dependence of the Casimir-Polder Force

Authors
  • Obrecht, J. M.
  • Wild, R. J.
  • Antezza, M.
  • Pitaevskii, L. P.
  • Stringari, S.
  • Cornell, E. A.
Type
Published Article
Publication Date
Feb 08, 2007
Submission Date
Aug 07, 2006
Identifiers
DOI: 10.1103/PhysRevLett.98.063201
Source
arXiv
License
Unknown
External links

Abstract

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.

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