Experimental verification of a modified fluctuation-dissipation relation for a micron-sized particle in a non-equilibrium steady state - ENS de Lyon - École normale supérieure de Lyon Access content directly
Preprints, Working Papers, ... Year : 2009

Experimental verification of a modified fluctuation-dissipation relation for a micron-sized particle in a non-equilibrium steady state

Artyom Petrosyan
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Sergio Ciliberto
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Raphael Chetrite
Krzysztof Gawedzki
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Abstract

A modified fluctuation-dissipation-theorem (MFDT) for a non-equilibrium steady state (NESS) is experimentally checked by studying the position fluctuations of a colloidal particle whose motion is confined in a toroidal optical trap. The NESS is generated by means of a rotating laser beam which exerts on the particle a sinusoidal conservative force plus a constant non-conservative one. The MFDT is shown to be perfectly verified by the experimental data. It can be interpreted as an equilibrium-like fluctuation-dissipation relation in the Lagrangian frame of the mean local velocity of the particle.
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Dates and versions

ensl-00365952 , version 1 (05-03-2009)
ensl-00365952 , version 2 (16-05-2009)
ensl-00365952 , version 3 (23-06-2009)

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Juan Ruben Gomez-Solano, Artyom Petrosyan, Sergio Ciliberto, Raphael Chetrite, Krzysztof Gawedzki. Experimental verification of a modified fluctuation-dissipation relation for a micron-sized particle in a non-equilibrium steady state. 2009. ⟨ensl-00365952v2⟩
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