Cao Francisco J, Dinis Luis, Parrondo Juan M R
Grupo Interdisciplinar de Sistemas Complejos (GISC) and Departamento de Física Atómica, Nuclear y Molecular, Universidad Complutense de Madrid, E-28040 Madrid, Spain.
Phys Rev Lett. 2004 Jul 23;93(4):040603. doi: 10.1103/PhysRevLett.93.040603.
An ensemble of Brownian particles in a feedback controlled flashing ratchet is studied. The ratchet potential is switched on and off depending on the position of the particles, with the aim of maximizing the current. We study in detail a protocol which maximizes the instant velocity of the center of mass of the ensemble at any time. This protocol is optimal for one particle and performs better than any periodic flashing for ensembles of moderate size, but is defeated by a random or periodic switching for large ensembles.
研究了反馈控制的闪烁棘轮中布朗粒子的集合。棘轮势根据粒子的位置开启和关闭，目的是使电流最大化。我们详细研究了一种协议，该协议能在任何时刻使集合质心的瞬时速度最大化。该协议对于单个粒子是最优的，对于中等规模的集合比任何周期性闪烁表现更好，但对于大型集合会被随机或周期性切换击败。
