Gomez-Solano J R, Petrosyan A, Ciliberto S, Chetrite R, Gawedzki K
Université de Lyon, Laboratoire de Physique, Ecole Normale Supérieure de Lyon, CNRS, 69364 Lyon CEDEX 07, France.
Phys Rev Lett. 2009 Jul 24;103(4):040601. doi: 10.1103/PhysRevLett.103.040601. Epub 2009 Jul 21.
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.
通过研究运动受限在环形光学陷阱中的胶体粒子的位置涨落，对非平衡稳态的修正涨落耗散定理进行了实验检验。非平衡稳态是通过旋转激光束产生的，该激光束对粒子施加正弦保守力加恒定非保守力。实验数据完美验证了修正涨落耗散定理。它可以被解释为在粒子平均局部速度的拉格朗日框架中的类平衡涨落耗散关系。
