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          Institute: MPI für Dynamik und Selbstorganisation     Collection: Biologische Physik und Evolutionäre Dynamik     Display Documents



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ID: 692216.0, MPI für Dynamik und Selbstorganisation / Biologische Physik und Evolutionäre Dynamik
Local disalignment can promote coherent
collective motion
Authors:Meschede, Matthias; Hallatschek, Oskar
Language:English
Date of Publication (YYYY-MM-DD):2013-04-29
Title of Journal:New Journal of Physics
Journal Abbrev.:New J. Phys.
Volume:15
Sequence Number of Article:045027
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:When particles move at a constant speed and have the tendency to align their directions of motion, ordered large-scale movement can emerge despite significant levels of noise. Many variants of this model of self-propelled particles have been studied to explain the coherent motion of groups of birds, fish or microbes. Here, we generalize the aligning interaction rule of many classical self-propelled particle models to the case where particles after the interaction tend to move in slightly different directions away from each other, as characterized by a deflection angle. We map out the resulting phase diagram and find that, in sufficiently dense systems, small local disalignment can lead to higher global alignment of particle movement directions. We show that in this dense regime, global alignment is accompanied by a rid-like spatial structure which allows information to rapidly percolate across the system by a ‘domino’ effect. Our results elucidate the relevance of disalignment for the emergence of collective motion in models with repulsive interaction terms.
Free Keywords:Instrumentation and measurement
Medical physics
Biological physics
External Publication Status:published
Document Type:Article
Communicated by:Folkert Müller-Hoissen
Affiliations:MPI für Dynamik und Selbstorganisation/Biologische Physik und Evolutionäre Dynamik
External Affiliations:Institut de Physique du Globe de Paris, F-75005 Paris, France
& Department of Physics, University of California, Berkeley, CA 94720, USA
Identifiers:DOI:10.1088/1367-2630/15/4/045027
URL:http://iopscience.iop.org/1367-2630/15/4/045027
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