Nonvanishing optimal noise in cellular automaton model of self-propelled particles

被引：3

作者：

Du, Guang-Le ^{[1
]}

Ye, Fang-Fu ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

来源：

CHINESE PHYSICS B | 2022年 / 31卷 / 08期

基金：

中国国家自然科学基金;

关键词：

self-propelled particle; optimal noise; cellular automaton; PHASE-TRANSITION; FLUCTUATIONS;

D O I：

10.1088/1674-1056/ac67c4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A minimal cellular automaton model is introduced to describe the collective motion of self-propelled particles on two-dimensional square lattice. The model features discretization of directional and positional spaces and single-particle occupation on one lattice site. Contrary to the Vicsek model and its variants, our model exhibits the nonvanishing optimal noise. When the particle density increases, the collective motion is promoted with optimal noise strength and reduced with noise strength out of optimal region. In addition, when the square lattice undergoes edge percolation process, no abrupt change of alignment behaviors is observed at the critical point of percolation.

引用

页数：5

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