Blickle V, Speck T, Lutz C, Seifert U, Bechinger C
2. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Phys Rev Lett. 2007 May 25;98(21):210601. doi: 10.1103/PhysRevLett.98.210601. Epub 2007 May 22.
The Einstein relation connecting the diffusion constant and the mobility is violated beyond the linear response regime. For a colloidal particle driven along a periodic potential imposed by laser traps, we test the recent theoretical generalization of the Einstein relation to the nonequilibrium regime which involves an integral over measurable velocity correlation functions.
连接扩散常数和迁移率的爱因斯坦关系在超出线性响应范围时不再成立。对于在激光阱施加的周期性势场中驱动的胶体粒子,我们检验了爱因斯坦关系到非平衡态的最新理论推广,该推广涉及对可测量速度关联函数的积分。