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  Local disalignment can promote coherent collective motion

Meschede, M., & Hallatschek, O. (2013). Local disalignment can promote coherent collective motion. New Journal of Physics, 15: 045027. doi:10.1088/1367-2630/15/4/045027.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0FF7-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-0FF8-6
Genre: Journal Article

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 Creators:
Meschede, Matthias1, Author              
Hallatschek, Oskar1, Author              
Affiliations:
1Max Planck Research Group Biological Physics and Evolutionary Dynamics, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063291              

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Free keywords: Instrumentation and measurement Medical physics Biological physics
 Abstract: 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.

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Language(s): eng - English
 Dates: 2013-04-29
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: Peer
 Degree: -

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Title: New Journal of Physics
  Alternative Title : New J. Phys.
Source Genre: Journal
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Pages: - Volume / Issue: 15 Sequence Number: 045027 Start / End Page: - Identifier: -