Measuring Out‐of‐Equilibrium Fluctuations

Bellon, Ludovic; Gomez‐Solano, J. R.; Petrosyan, Artyom; Ciliberto, S.

doi:10.1002/9783527658701.ch4

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2013

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“…The Fluctuation Theorem both for transients and for steady states has been demonstrated in optical tweezer experiments [28] and other kinds of laboratory experiment [29]. Each of the other theorems has been validated in computer simulation experiments [30].…”

Section: Resultsmentioning

confidence: 90%

On the relationship between dissipation and the rate of spontaneous entropy production from linear irreversible thermodynamics

Williams

Searles

Evans

2013

Molecular Simulation

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When systems are far from equilibrium, the temperature, the entropy and the thermodynamic entropy production are not defined and the Gibbs entropy does not provide useful information about the physical properties of a system. Furthermore, far from equilibrium, or if the dissipative field changes in time, the spontaneous entropy production of linear irreversible thermodynamics becomes irrelevant. In 2000 we introduced a definition for the dissipation function and showed that for systems of arbitrary size, arbitrarily near or far from equilibrium, the time integral of the ensemble average of this quantity can never decrease. In the low field limit its ensemble average becomes equal to the spontaneous entropy production of linear irreversible thermodynamics. We discuss how these quantities are related and why one should use dissipation rather than entropy or entropy production for nonequilibrium systems.

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Section: Resultsmentioning

confidence: 90%