title: Velocity Condensation for Magnetotactic Bacteria.
abstract: 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.
authors.affiliation: Ecole Normale Supérieure, Laboratoire de Physique Statistique, UMR CNRS 8550, 24 rue Lhomond, Paris, France.|Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, 117411, Singapore.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Rupprecht
authors.affiliation: Institut Lumière Matière, UMR CNRS 5306, Université Lyon 1, Lyon, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Waisbord
authors.affiliation: Institut Lumière Matière, UMR CNRS 5306, Université Lyon 1, Lyon, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Ybert
authors.affiliation: Institut Lumière Matière, UMR CNRS 5306, Université Lyon 1, Lyon, France.
authors.forename: Cécile
authors.initials: C
authors.lastname: Cottin-Bizonne
authors.affiliation: Ecole Normale Supérieure, Laboratoire de Physique Statistique, UMR CNRS 8550, 24 rue Lhomond, Paris, France.
authors.forename: Lydéric
authors.initials: L
authors.lastname: Bocquet
mesh_terms: D001419:Bacteria; D018407:Bacterial Physiological Phenomena; D001696:Biomechanical Phenomena; D004058:Diffusion; D060526:Magnetic Fields; D008954:Models, Biological; D009068:Movement; D019415:Torque