Ratchet transport of overdamped particles in superimposed driven lattices  

作　　者：Shu-Na Huang Wei-Jing Zhu Xiao-Qun Huang Bao-Quan Ai Feng-Guo Li 黄淑娜;朱薇静;黄小群;艾保全;李丰果(Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering,South China Normal University)

机构地区：[1]Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering,South China Normal University

出　　处：《Chinese Physics B》2019年第4期108-112,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11575064 and 11175067);the PCSIRT(Grant No.IRT1243);the GDUPS Project(2016);the Natural Science Foundation of Guangdong Province,China(Grant Nos.2016A030313433 and 2017A030313029);the Innovation Project of Graduate School of South China Normal University

摘　　要：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.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.

关 键 词：GAUSSIAN WHITE noise superimposed DRIVEN LATTICES RECTIFICATION 

分 类 号：O4[理学—物理]