Details

Autor(en) / Beteiligte

• Gomez-Solano, J R
• Petrosyan, A
• Ciliberto, S
• Chetrite, R
• Gawedzki, K

Titel

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

Ist Teil von

• Physical review letters, 2009-07, Vol.103 (4), p.040601-040601, Article 040601

Ort / Verlag

United States

Erscheinungsjahr

2009

Link zum Volltext

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• A modified fluctuation-dissipation theorem for a nonequilibrium steady state is experimentally checked by studying the position fluctuations of a colloidal particle whose motion is confined in a toroidal optical trap. The nonequilibrium steady state is generated by means of a rotating laser beam which exerts on the particle a sinusoidal conservative force plus a constant nonconservative one. The modified fluctuation-dissipation theorem is perfectly verified by the experimental data. It can be interpreted as an equilibriumlike fluctuation-dissipation relation in the Lagrangian frame of the mean local velocity of the particle.