Heat fluctuations in an out of equilibrium bath

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 : Monday, April 11, 2011 - 6:13:18 PM
Last modification on : Thursday, November 21, 2019 - 2:39:30 AM
Long-term archiving on : Tuesday, July 12, 2011 - 2:31:31 AM

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  • HAL Id : ensl-00566267, version 2
  • ARXIV : 1102.4750

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Juan Ruben Gomez-Solano, Artyom Petrosyan, Sergio Ciliberto. Heat fluctuations in an out of equilibrium bath. Physical Review Letters, American Physical Society, 2011, 106, p.200602, pp.4. ⟨ensl-00566267v2⟩

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