中国物理B ›› 2022, Vol. 31 ›› Issue (4): 40503-040503.doi: 10.1088/1674-1056/ac3391

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Ratchet transport of self-propelled chimeras in an asymmetric periodic structure

Wei-Jing Zhu(朱薇静)1,† and Bao-Quan Ai(艾保全)2,‡   

  1. 1 School of Photoelectric Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China;
    2 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:2021-08-09 修回日期:2021-09-29 接受日期:2021-10-27 出版日期:2022-03-16 发布日期:2022-03-29
  • 通讯作者: Wei-Jing Zhu, Bao-Quan Ai E-mail:zhuweijing996@163.com;aibq@scnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 12075090), the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2019B030330001), the Science and Technology Program of Guangzhou City (Grant No. 2019050001), the Natural Science Foundation of Guangdong Province, China (Grant No. 2017A030313029), and the Major Basic Research Project of Guangdong Province, China (Grant No. 2017KZDXM024).

Ratchet transport of self-propelled chimeras in an asymmetric periodic structure

Wei-Jing Zhu(朱薇静)1,† and Bao-Quan Ai(艾保全)2,‡   

  1. 1 School of Photoelectric Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China;
    2 Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
  • Received:2021-08-09 Revised:2021-09-29 Accepted:2021-10-27 Online:2022-03-16 Published:2022-03-29
  • Contact: Wei-Jing Zhu, Bao-Quan Ai E-mail:zhuweijing996@163.com;aibq@scnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 12075090), the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2019B030330001), the Science and Technology Program of Guangzhou City (Grant No. 2019050001), the Natural Science Foundation of Guangdong Province, China (Grant No. 2017A030313029), and the Major Basic Research Project of Guangdong Province, China (Grant No. 2017KZDXM024).

摘要: We studied the rectified transport of underdamped particles subject to phase lag in an asymmetric periodic structure. When the inertia effect is considered, it is possible to observe reversals of the average velocity with small self-propelled force, whereas particles always move in the positive direction with large self-propelled force. The introduction of phase lag leads particles to follow circular orbits and suppress the polar motion. In addition, this can adjust the direction of particle motion. There exists an optimal value of polar interaction strength at which the rectification is maximal. These results open the way for many application processes, such as spatial sorting of particles mixture and separation based on their physical properties.

关键词: Brownian motion, self-propelled particles, stochastic processes

Abstract: We studied the rectified transport of underdamped particles subject to phase lag in an asymmetric periodic structure. When the inertia effect is considered, it is possible to observe reversals of the average velocity with small self-propelled force, whereas particles always move in the positive direction with large self-propelled force. The introduction of phase lag leads particles to follow circular orbits and suppress the polar motion. In addition, this can adjust the direction of particle motion. There exists an optimal value of polar interaction strength at which the rectification is maximal. These results open the way for many application processes, such as spatial sorting of particles mixture and separation based on their physical properties.

Key words: Brownian motion, self-propelled particles, stochastic processes

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

  • 05.40.-a
45.50.-j (Dynamics and kinematics of a particle and a system of particles) 02.50.-r (Probability theory, stochastic processes, and statistics)