中国物理B ›› 2022, Vol. 31 ›› Issue (4): 40204-040204.doi: 10.1088/1674-1056/ac29b1
Yi-Qi Xia(夏益祺)1,2,†, Guo-Qiang Feng(冯国强)2, and Zhuang-Lin Shen(谌庄琳)2,3,‡
Yi-Qi Xia(夏益祺)1,2,†, Guo-Qiang Feng(冯国强)2, and Zhuang-Lin Shen(谌庄琳)2,3,‡
摘要: We design a nunchakus-like tracer and investigate its self-adaptive behavior in an active Brownian particle (ABP) bath via systematically tuning the self-propelled capability and density of ABPs. Specifically, the nunchakus-like tracer will have a stable wedge-like shape in the ABP bath when the self-propelled force is high enough. We analyze the angle between the two arms of the tracer and the velocity of the joint point of the tracer. The angle exhibits a non-monotonic phenomenon as a function of active force. However, it increases with density of ABPs increasing monotonically. A simple linear relationship between the velocity and the self-propelled force is found under the highly active force. In other words, the joint points of the tracer diffuse and the super-diffusive behavior can make the relation between the self-propelled force and the density of ABPs persist longer. In addition, we find that the tracer can flip at high density of ABPs. Our results also suggest the new self-adaptive model research of the transport properties in a non-equilibrium medium.
中图分类号: (Molecular dynamics and particle methods)