Ratchet transport of overdamped particles in superimposed driven lattices
Ratchet transport of overdamped particles in superimposed driven lattices
复制标题
叠加驱动晶格中过阻尼粒子的棘轮输运
DOI：
10.1088/1674-1056/28/4/040502
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Li Feng Guo
中科院分区：
文献类型：
--
作者：
Huang Shu Na;Zhu Wei Jing;Huang Xiao Qun;Ai Bao Quan;Li Feng Guo
利用朗之万动力学模拟方法研究了过阻尼粒子在叠加驱动晶格中的棘轮输运。研究发现，噪声对颗粒的输运有很大影响。当晶格驱动主导输运时，噪声作为定向输运的扰动，减慢了粒子的平均速度。当驱动相位对粒子输运影响较小时，高斯白噪声可以起到积极的作用。通过简单地调制这两个参数，我们就可以控制效率和定向电流的方向。
Ratchet transport of overdamped particles is investigated in superimposed driven lattices using Langevin dynamics simulations. It is found that noise can strongly affect the transport of the particles. When lattices driving dominates the transport, the noise acts as a disturbance of the directed transport and slows down the average velocity of the particles. When the driving phase has less impact on particle transport, Gaussian white noise can play a positive role. By simply modulating these two parameters, we can control efficiency and the direction of the directed currents.