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Variational formula for experimental determination of high-order correlations of current fluctuations in driven systems

Authors
  • Nemoto, Takahiro
  • Sasa, Shin-ichi
Type
Published Article
Publication Date
Dec 09, 2010
Submission Date
Sep 17, 2010
Identifiers
DOI: 10.1103/PhysRevE.83.030105
Source
arXiv
License
Yellow
External links

Abstract

For Brownian motion of a single particle subject to a tilted periodic potential on a ring, we propose a formula for experimentally determining the cumulant generating function of time-averaged current without measurements of current fluctuations. We first derive this formula phenomenologically on the basis of two key relations: a fluctuation relation associated with Onsager's principle of the least energy dissipation in a sufficiently local region and an additivity relation by which spatially inhomogeneous fluctuations can be properly considered. We then derive the formula without any phenomenological assumptions. We also demonstrate its practical advantage by numerical experiments.

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