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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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Contributor : Sergio Ciliberto Connect in order to contact the contributor
Submitted on : Thursday, March 1, 2012 - 6:45:25 PM
Last modification on : Friday, February 12, 2021 - 10:58:07 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



Juan Ruben Gomez-Solano, Artyom Petrosyan, Sergio Ciliberto. Fluctuations, linear response and heat flux of an aging system. EPL - Europhysics Letters, 2012, 98 p.10007, pp.6. ⟨ensl-00653786v2⟩



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