2014/11/19 by Bao-Quan Ai, Bao-quan Ai, Ya-feng He +3 · 35 citations
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Brownian motion #Brownian motor #Drift velocity #Micro and Nano Robotics #Ratchet #Ratchet effect #Work (physics) #cond-mat.soft #cond-mat.stat-mech #stochastic dynamics and bifurcation
paper · pdf · doi:10.1063/1.4901896
published in The Journal of Chemical Physics 141(19), 194111 (American Institute of Physics) · 12 pages, 5figures
openalex publication_date 2014/11/19 · arxiv created 2015/05/10 · arxiv updated 2015/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Directed transport of interacting active (self-propelled) Brownian particles is numerically investigated in confined geometries (entropic barriers). The self-propelled velocity can break thermodynamical equilibrium and induce the directed transport. It is found that the interaction between active particles can greatly affect the ratchet transport. For attractive particles, on increasing the interaction strength, the average velocity first decreases to its minima, then increases, and finally decreases to zero. For repulsive particles, when the interaction is very weak, there exists a critical interaction at which the average velocity is minimal, nearly tends to zero, however, for the strong interaction, the average velocity is independent of the interaction.