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Published on: April 10, 2017
Heat fluctuations in a nonequilibrium bath
J R Gomez-Solano1, A Petrosyan, S Ciliberto
1Laboratoire de Physique, École Normale Supérieure de Lyon, CNRS UMR 5672, 46, Allée d'Italie, 69364 Lyon CEDEX 07, France. juan.gomez_solano@ens-lyon.fr
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 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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