Fluctuations of Fluctuation-Induced "Casimir" Forces

Details Fluctuations of Fluctuation-Induced "Casimir" Forces Fluctuations of Fluctuation-Induced "Casimir" Forces

2002-08-06

arxiv.org/abs/cond-mat/0208095v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.89.230601

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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