中国物理B ›› 2019, Vol. 28 ›› Issue (4): 40502-040502.doi: 10.1088/1674-1056/28/4/040502

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Ratchet transport of overdamped particles in superimposed driven lattices

Shu-Na Huang(黄淑娜), Wei-Jing Zhu(朱薇静), Xiao-Qun Huang(黄小群), Bao-Quan Ai(艾保全), Feng-Guo Li(李丰果)   

  1. Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
  • 收稿日期:2018-11-11 修回日期:2019-01-15 出版日期:2019-04-05 发布日期:2019-04-05
  • 通讯作者: Bao-Quan Ai E-mail:aibq@scnu.edu.cn
  • 基金资助:

    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), and the Innovation Project of Graduate School of South China Normal University.

Ratchet transport of overdamped particles in superimposed driven lattices

Shu-Na Huang(黄淑娜), Wei-Jing Zhu(朱薇静), Xiao-Qun Huang(黄小群), Bao-Quan Ai(艾保全), Feng-Guo Li(李丰果)   

  1. Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
  • Received:2018-11-11 Revised:2019-01-15 Online:2019-04-05 Published:2019-04-05
  • Contact: Bao-Quan Ai E-mail:aibq@scnu.edu.cn
  • Supported by:

    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), and 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.

关键词: Gaussian white noise, superimposed driven lattices, rectification

Abstract:

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.

Key words: Gaussian white noise, superimposed driven lattices, rectification

中图分类号:  (Fluctuation phenomena, random processes, noise, and Brownian motion)

  • 05.40.-a
37.10.Jk (Atoms in optical lattices) 73.40.Ei (Rectification)