par Andrieux, David ;Gaspard, Pierre ;Ciliberto, Sergio;Garnier, N.;Joubaud, S.;Petrosyan, A.
Référence Physical review letters, 98, 15, 150601
Publication Publié, 2007
Référence Physical review letters, 98, 15, 150601
Publication Publié, 2007
Article révisé par les pairs
Résumé : | 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. © 2007 The American Physical Society. |