Velocity condensation for magnetotactic bacteria

Magnetotactic swimmers tend to align along magnetic field lines against stochastic reorientations. We show that the swimming strategy, e.g. active Brownian motion versus run-and-tumble dynamics, strongly affects the orientation statistics. The latter can exhibit a velocity condensation whereby the a...

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Bibliographic Details
Published inarXiv.org
Main Authors Rupprecht, Jean-Francois, Waisbord, Nicolas, Ybert, Christophe, Cottin-Bizonne, Cécile, Bocquet, Lydéric
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 13.07.2016
Subjects
Brownian motion
Condensation
Phase transitions
Physics - Biological Physics
Physics - Data Analysis, Statistics and Probability
Physics - Soft Condensed Matter
Physics - Statistical Mechanics
Swimming
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Summary:Magnetotactic swimmers tend to align along magnetic field lines against stochastic reorientations. We show that the swimming strategy, e.g. active Brownian motion versus run-and-tumble dynamics, strongly affects the orientation statistics. The latter can exhibit a velocity condensation whereby the alignment probability density diverges. As a consequence, we find that the swimming strategy affects the nature of the phase transition to collective motion, indicating that Lévy run-and-tumble walks can outperform active Brownian processes as strategies to trigger collective behavior.
ISSN:2331-8422
DOI:10.48550/arxiv.1511.03790