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research article

Micro-flock patterns and macro-clusters in chiral active Brownian disks

Levis, Demian
•
Liebchen, Benno
February 28, 2018
Journal of Physics: Condensed Matter

Chiral active particles (or self-propelled circle swimmers) feature a rich collective behavior, comprising rotating macro-clusters and micro-flock patterns which consist of phase-synchronized rotating clusters with a characteristic self-limited size. These patterns emerge from the competition of alignment interactions and rotations suggesting that they might occur generically in many chiral active matter systems. However, although excluded volume interactions occur naturally among typical circle swimmers, it is not yet clear if macro-clusters and micro-flock patterns survive their presence. The present work shows that both types of pattern do survive but feature strongly enhance fluctuations regarding the size and shape of the individual clusters. Despite these fluctuations, we find that the average micro-flock size still follows the same characteristic scaling law as in the absence of excluded volume interactions, i.e. micro-flock sizes scale linearly with the single-swimmer radius.

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Type
research article
DOI
10.1088/1361-648X/aaa5ec
Web of Science ID

WOS:000423841000001

Author(s)
Levis, Demian
Liebchen, Benno
Date Issued

2018-02-28

Published in
Journal of Physics: Condensed Matter
Volume

30

Issue

8

Article Number

084001

Subjects

Physics, Condensed Matter

•

Physics

•

active matter

•

pattern formation

•

clustering

•

brownian dynamics

•

escherichia-coli

•

sperm cells

•

motion

•

chemotaxis

•

particles

•

bacteria

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
SB  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/152436
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