ensl-00365952
https://ens-lyon.hal.science/ensl-00365952
https://ens-lyon.hal.science/ensl-00365952v1/document
https://ens-lyon.hal.science/ensl-00365952v1/file/article_MFDT_NESS_8.pdf
arxiv:0903.1075
[PRUNEL] Ecole Normale SupĂ©rieure de Lyon
Experimental verification of a modified fluctuation-dissipation relation for a micron-sized particle in a non-equilibrium steady state
Gomez-Solano, Juan Ruben
Petrosyan, Artyom
Ciliberto, Sergio
Chetrite, Raphael
Gawedzki, Krzysztof
[PHYS.COND.CM-SM] Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]
UNDEFINED
Non-equilibrium steady state
fluctuation-dissipation relations
Langevin dynamics
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.
2009-03-05
2009-03-05
en