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Preprints, Working Papers, ... Year : 2011

Heat fluctuation theorem for a relaxing system


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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Dates and versions

ensl-00566267 , version 1 (15-02-2011)
ensl-00566267 , version 2 (11-04-2011)



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