Collective motion of pulsating active particles in confined structures

被引:0
|
作者
Liu, Wan-hua [1 ]
Zhu, Wei-jing [2 ]
Ai, Bao-quan [1 ,3 ,4 ]
机构
[1] South China Normal Univ, Sch Phys, Key Lab Atom & Subatom Struct & Quantum Control, Minist Educ,Guangdong Basic Res Ctr Excellence Str, Guangzhou 510006, Peoples R China
[2] Guangdong Polytech Normal Univ, Sch Photoelect Engn, Guangzhou 510665, Peoples R China
[3] South China Normal Univ, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Peoples R China
[4] South China Normal Univ, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou 510006, Peoples R China
来源
NEW JOURNAL OF PHYSICS | 2024年 / 26卷 / 02期
基金
中国国家自然科学基金;
关键词
pulsating active particles; collective motion; ratchet; BROWNIAN MOTORS; RATCHET; FLUCTUATIONS; TRANSPORT;
D O I
10.1088/1367-2630/ad23a5
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The collective motion of pulsating active particles with periodic size contraction is investigated in a two-dimensional asymmetric channel. Our findings reveal that changes in particle size can act as a non-equilibrium driving force, disrupting the system's thermodynamic equilibrium and leading to the transformation of self-contraction motion into directional motion in the asymmetric channel. The specific direction of motion is dictated by the symmetrical properties of the channel. Furthermore, our study identifies an optimal degree of channel opening (or self-pulsation frequency) at which the average velocity reaches its peak value. At lower frequencies, the average velocity demonstrates a peak function in relation to the self-pulsation amplitude (or particle number density). Conversely, at higher frequencies, the average velocity increases with the self-pulsation amplitude (or particle number density). The system exhibits three distinct states: the arrested ordered state, disordered state, and cycling ordered state. Notably, particle rectification reaches its optimum in the disordered state.
引用
收藏
页数:11
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