An Extension of the Fluctuation Theorem

Details An Extension of the Fluctuation Theorem An Extension of the Fluctuation Theorem

2003-05-07

arxiv.org/abs/cond-mat/0305147v1

Phys. Rev. Lett. 91, 110601 (2003).

Physics

Condensed Matter

Statistical Mechanics

12 pages, 1 eps figure in color (though intelligible in black and white)

Scientific paper

10.1103/PhysRevLett.91.110601

Heat fluctuations are studied in a dissipative system with both mechanical and stochastic components for a simple model: a Brownian particle dragged through water by a moving potential. An extended stationary state fluctuation theorem is derived. For infinite time, this reduces to the conventional fluctuation theorem only for small fluctuations; for large fluctuations, it gives a much larger ratio of the probabilities of the particle to absorb rather than supply heat. This persists for finite times and should be observable in experiments similar to a recent one of Wang et al.

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