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Journal Articles Physical Review Letters Year : 2011

Heat fluctuations in an out of equilibrium bath

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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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Dates and versions

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

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