Collective dynamics of self-propelled particles with variable speed


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MISHRA, Shradha, Kolbjørn TUNSTRØM, Iain D. COUZIN, Cristián HUEPE, 2012. Collective dynamics of self-propelled particles with variable speed. In: Physical Review E. 86(1), 011901. ISSN 1539-3755. eISSN 1550-2376. Available under: doi: 10.1103/PhysRevE.86.011901

@article{Mishra2012Colle-37057, title={Collective dynamics of self-propelled particles with variable speed}, year={2012}, doi={10.1103/PhysRevE.86.011901}, number={1}, volume={86}, issn={1539-3755}, journal={Physical Review E}, author={Mishra, Shradha and Tunstrøm, Kolbjørn and Couzin, Iain D. and Huepe, Cristián}, note={Article Number: 011901} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dc:contributor>Couzin, Iain D.</dc:contributor> <dc:contributor>Mishra, Shradha</dc:contributor> <dspace:hasBitstream rdf:resource=""/> <bibo:uri rdf:resource=""/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:language>eng</dc:language> <dcterms:isPartOf rdf:resource=""/> <dcterms:abstract xml:lang="eng">Understanding the organization of collective motion in biological systems is an ongoing challenge. In this Paper we consider a minimal model of self-propelled particles with variable speed. Inspired by experimental data from schooling fish, we introduce a power-law dependency of the speed of each particle on the degree of polarization order in its neighborhood. We derive analytically a coarse-grained continuous approximation for this model and find that, while the variable speed rule does not change the details of the ordering transition leading to collective motion, it induces an inverse power-law correlation between the speed or the local polarization order and the local density. Using numerical simulations, we verify the range of validity of this continuous description and explore regimes beyond it. We discover, in disordered states close to the transition, a phase-segregated regime where most particles cluster into almost static groups surrounded by isolated high-speed particles. We argue that the mechanism responsible for this regime could be present in a wide range of collective motion dynamics.</dcterms:abstract> <dc:contributor>Huepe, Cristián</dc:contributor> <dspace:isPartOfCollection rdf:resource=""/> <dcterms:available rdf:datatype="">2017-02-02T09:36:14Z</dcterms:available> <dc:creator>Mishra, Shradha</dc:creator> <dc:date rdf:datatype="">2017-02-02T09:36:14Z</dc:date> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <dc:creator>Huepe, Cristián</dc:creator> <dcterms:rights rdf:resource=""/> <dc:creator>Couzin, Iain D.</dc:creator> <dcterms:hasPart rdf:resource=""/> <dc:contributor>Tunstrøm, Kolbjørn</dc:contributor> <dcterms:issued>2012</dcterms:issued> <dc:rights>terms-of-use</dc:rights> <dcterms:title>Collective dynamics of self-propelled particles with variable speed</dcterms:title> <dc:creator>Tunstrøm, Kolbjørn</dc:creator> </rdf:Description> </rdf:RDF>

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