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Heat fluctuation theorem for a relaxing system

Abstract : We measure the energy fluctuations of a Brownian particle confined by an optical trap in an aging gelatin after a very fast quench (less than 1 ms). The strong nonequilibrium fluctuations due to the assemblage of the gel, are interpreted, within the framework of fluctuation theorem, as a heat flux from the particle towards the bath. We derive, from a simple model, an analytical expression of the heat probability distribution, which fits the experimental data and satisfies a fluctuation relation similar to that of a system in contact with two baths at different temperatures.
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Contributor : Sergio Ciliberto <>
Submitted on : Tuesday, February 15, 2011 - 5:06:38 PM
Last modification on : Thursday, April 19, 2018 - 2:54:03 PM
Document(s) archivé(s) le : Monday, May 16, 2011 - 3:18:58 AM


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  • HAL Id : ensl-00566267, version 1
  • ARXIV : 1102.4750



Juan Ruben Gomez-Solano, Artyom Petrosyan, Sergio Ciliberto. Heat fluctuation theorem for a relaxing system. 2011. ⟨ensl-00566267v1⟩



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