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

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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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00365952
Contributor : Juan Ruben Gomez-Solano <>
Submitted on : Saturday, May 16, 2009 - 3:27:24 PM
Last modification on : Thursday, April 19, 2018 - 2:54:03 PM
Long-term archiving on : Wednesday, September 22, 2010 - 12:14:46 PM

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  • HAL Id : ensl-00365952, version 2
  • ARXIV : 0903.1075

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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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