Fluctuations, linear response and heat flux of an aging system

Abstract : We measure the fluctuations of the position of a Brownian particle confined by an optical trap in an aging gelatin droplet after a fast quench. Its linear response to an external perturbation is also measured. We compute the spontaneous heat flux from the particle to the bath due to the nonequilibrium formation of the gel. We show that the mean heat flux is quantitatively related to the violation of the equilibrium fluctuation-dissipation theorem as a measure of the broken detailed balance during the aging process.
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00653786
Contributor : Sergio Ciliberto <>
Submitted on : Thursday, March 1, 2012 - 6:45:25 PM
Last modification on : Wednesday, November 20, 2019 - 2:34:40 AM
Long-term archiving on : Thursday, May 31, 2012 - 2:56:07 AM

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  • HAL Id : ensl-00653786, version 2
  • ARXIV : 1112.5244

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Juan Ruben Gomez-Solano, Artyom Petrosyan, Sergio Ciliberto. Fluctuations, linear response and heat flux of an aging system. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2012, 98 p.10007, pp.6. ⟨ensl-00653786v2⟩

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