Work fluctuation theorems for harmonic oscillators.
The work fluctuations of an oscillator in contact with a thermostat and driven out of equilibrium by an external force are studied experimentally and theoretically within the context of fluctuation theorems. The oscillator dynamics is modeled by a second order Langevin equation. Both the transient and stationary state fluctuation theorems hold and the finite time corrections are very different from those of a first order Langevin equation. The periodic forcing of the oscillator is also studied; it presents new and unexpected short time convergences. Analytical expressions are given in all cases.
Douarche
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Laboratoire de Physique de l'ENS Lyon, CNRS UMR 5672, 46, Allée d'Italie, 69364 Lyon Cedex 07, France.
Joubaud
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Garnier
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Petrosyan
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Ciliberto
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