Collective motion of polar active particles on a sphere  

作　　者：Yi Chen Jun Huang Fan-Hua Meng Teng-Chao Li Bao-Quan Ai 陈奕;黄竣;孟繁华;李腾超;艾保全(Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Guangzhou 510006,China;Guangdong-Hong Kong Joint Laboratory of Quantum Matter,South China Normal University,Guangzhou 510006,China)

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,Guangzhou 510006,China [2]Guangdong-Hong Kong Joint Laboratory of Quantum Matter,South China Normal University,Guangzhou 510006,China

出　　处：《Chinese Physics B》2021年第10期239-244,共6页中国物理B（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(Grant Nos.12075090 and 12005066);the Science and Technology Program of Guangzhou(Grant No.2019050001);the Natural Science Foundation of Guangdong Province,China(Grant No.2017A030313029);the Major Basic Research Project of Guangdong Province,China(Grant No.2017KZDXM024)。

摘　　要：Collective motion of active particles with polar alignment is investigated on a sphere.We discussed the factors that affect particle swarm motion and define an order parameter that can show the degree of particle swarm motion.In the model,we added a polar alignment strength,along with Gaussian curvature,affecting particles swarm motion.We find that when the force exceeds a certain limit,the order parameter will decrease with the increase of the force.Combined with our definition of order parameter and observation of the model,the reason is that particles begin to move side by side under the influence of polar forces.In addition,the effects of velocity,rotational diffusion coefficient,and packing fraction on particle swarm motion are discussed.It is found that the rotational diffusion coefficient and the packing fraction have a great influence on the clustering motion of particles,while the velocity has little influence on the clustering motion of particles.

关 键 词：clustering motion of Brownian particles polar active particles SPHERE 

分 类 号：O552[理学—热学与物质分子运动论]