Université de Lyon (92 rue Pasteur - CS 30122, 69361 Lyon Cedex 07 - France)
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 CilibertoConnect in order to contact the contributor Submitted on : Monday, April 30, 2007 - 8:00:37 AM Last modification on : Tuesday, October 19, 2021 - 12:55:33 PM 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⟩