Clustering and anisotropic correlated percolation in polar flocks

被引：8

作者：

Kyriakopoulos, Nikos ^{[1
]}

Chate, Hugues ^{[2
,3
]}

Ginelli, Francesco ^{[4
,5
]}

机构：

[1] Aalto Univ, Dept Appl Phys, Espoo 02150, Finland

[2] Univ Paris Saclay, CEA Saclay, CNRS, Serv Phys Etat Condense,CEA, F-91191 Gif Sur Yvette, France

[3] Beijing Computat Sci Res Ctr, Beijing 100094, Peoples R China

[4] Univ Aberdeen, Kings Coll, Dept Phys, Aberdeen AB24 3UE, Scotland

[5] Univ Aberdeen, Kings Coll, Inst Complex Syst & Math Biol, Aberdeen AB24 3UE, Scotland

来源：

PHYSICAL REVIEW E | 2019年 / 100卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

FLUCTUATIONS; BEHAVIOR;

D O I：

10.1103/PhysRevE.100.022606

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

We study clustering and percolation phenomena in the Vicsek model, taken here in its capacity of prototypical model for dry aligning active matter. Our results show that the order-disorder transition is not related in any way to a percolation transition, contrary to some earlier claims. We study geometric percolation in each of the phases at play, but we mostly focus on the ordered Toner-Tu phase, where we find that the long-range correlations of density fluctuations give rise to an anisotropic percolation transition.

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页数：12

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