Entropy production and time asymmetry in nonequilibrium fluctuations

被引：126

作者：

Andrieux, D.

Gaspard, P.

Ciliberto, S.

Garnier, N.

Joubaud, S.

Petrosyan, A.

机构：

[1] Univ Libre Bruxelles, Ctr Nonlinear Phenomena & Complex Syst, B-1050 Brussels, Belgium

[2] Ecole Normale Super Lyon, Phys Lab, CNRS, UMR 5672, F-69364 Lyon 07, France

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.98.150601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

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页数：4

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