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Paper   IPM / Physic / 6923
School of Physics
  Title:   Fluctuations of Flctuation-Induced Casimir-Like Forces
1.  D. bartolo
2.  A. Ajdari
3.  J. B. Fournier
4.  R. Golestanian
  Status:   Published
  Journal: Phys. Rev. Lett.
  No.:  51
  Vol.:  89
  Year:  2002
  Pages:   230601-1-4
  Supported by:  IPM
The force experienced by objects embedded in a correlated medium undergoing thermal fluctuations-the so-called fluctuation-induced force-is actually itself a fluctuating quantity. We compute the corresponding probability distribution and show that it is a Gaussian centered on the well-known Casimir force, with a non-universal standard deviation that can be typically as large as the mean force itself. The relevance of these results to the experimental measurement of fluctuation-induced forces is discussed, as well as the influence of the finite temporal resolution of the measuring apparatus.

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