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.
Entropy production and time asymmetry in nonequilibrium fluctuations.
D. Andrieux,P. Gaspard,S. Ciliberto,N. Garnier,S. Joubaud,A. Petrosyan
Published 2007 in Physical Review Letters
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- Publication year
2007
- Venue
Physical Review Letters
- Publication date
2007-03-27
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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