Abstract : The time-reversal symmetry of nonequilibrium fluctuations is experimentally investigated in two out-of-equilibrium systems namely, a Brownian particle in a trap moving at constant speed and an electric circuit with an imposed mean current. The dynamical randomness of their nonequilibrium fluctuations is characterized in terms of the standard and time-reversed entropies per unit time of dynamical systems theory. We present experimental results showing that their difference equals the thermodynamic entropy production in units of Boltzmann's constant.
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00138228
Contributor : Sergio Ciliberto
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Submitted on : Monday, April 30, 2007 - 8:00:37 AM
Last modification on : Wednesday, November 20, 2019 - 8:02:35 AM
Long-term archiving on : Tuesday, September 21, 2010 - 12:40:10 PM
David Andrieux, Pierre Gaspard, Sergio Ciliberto, Nicolas Garnier, Sylvain Joubaud, et al.. Entropy production and time asymmetry in nonequilibrium fluctuations. Physical Review Letters, American Physical Society, 2007, pp.150601. ⟨ensl-00138228v2⟩
