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Nonequilibrium transport characteristics of substances in a rough potential field

Author

Listed:
  • Wang, Peng
  • Zhang, Yang
  • Zhang, Peng-Juan
  • Huo, Jie
  • Wang, Xu-Ming
  • Wang, Bing-Hong

Abstract

A Langevin equation is proposed to describe the transport of overdamped Brownian particles in a periodic rough potential and driven by an unbiased periodic force. The equation can be transformed into the Fokker–Planck equation by using the Kramers–Moyal expansions. The time-dependent solution of Fokker–Planck equation demonstrates different modes of the probability flow. These modes include creeping in a single direction, direction reversal and oscillating in both directions in the coordinate space. By varying the roughness and noise intensity, the flow can transform between the modes. The correlation between the noise and space indicates that the noise can maintain the oscillation of the modes and prolong the transient time to the steady state at which the flow tends to be zero.

Suggested Citation

  • Wang, Peng & Zhang, Yang & Zhang, Peng-Juan & Huo, Jie & Wang, Xu-Ming & Wang, Bing-Hong, 2023. "Nonequilibrium transport characteristics of substances in a rough potential field," Chaos, Solitons & Fractals, Elsevier, vol. 170(C).
    • Handle: RePEc:eee:chsofr:v:170:y:2023:i:c:s0960077923002515
    DOI: 10.1016/j.chaos.2023.113350
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    References listed on IDEAS

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    1. Wang, Peng & Huo, Jie & Wang, Xu-Ming & Wang, Bing-Hong, 2022. "Diffusion and memory effect in a stochastic process and the correspondence to an information propagation in a social system," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 607(C).
    2. Fendrik, A.J. & Romanelli, L. & Perazzo, R.P.J., 2006. "Collective modes in a coupled ratchet model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 368(1), pages 7-15.
    3. Zhu, Wei-jing & Wu, Jian-chun & Ai, Bao-quan, 2022. "Ratchet transport of particles in the obstacle lattices with topographical gradients," Chaos, Solitons & Fractals, Elsevier, vol. 162(C).
    4. Shi, Hong-Da & Du, Lu-Chun & Huang, Fei-Jie & Guo, Wei, 2022. "Collective topological active particles: Non-ergodic superdiffusion and ageing in complex environments," Chaos, Solitons & Fractals, Elsevier, vol. 157(C).
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    Cited by:

    1. Zhang, Peng-Juan & Zhang, Ji-Qiang & Wang, Peng & Huo, Jie & Wang, Xu-Ming, 2024. "Directed transport of two-coupled particles under the coordination of the coupling and an asymmetric potential," Chaos, Solitons & Fractals, Elsevier, vol. 182(C).

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