title: Collective Behavior of Quorum-Sensing Run-and-Tumble Particles under Confinement.
abstract: We study a generic model for quorum-sensing bacteria in circular confinement. Every bacterium produces signaling molecules, the local concentration of which triggers a response when a certain threshold is reached. If this response lowers the motility, then an aggregation of bacteria occurs which differs fundamentally from standard motility-induced phase separation due to the long-ranged nature of the concentration of signal molecules. We analyze this phenomenon analytically and by numerical simulations employing two different protocols leading to stationary cluster and ring morphologies, respectively.
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Rein
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany.
authors.forename: Nike
authors.initials: N
authors.lastname: Heinß
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany.
authors.forename: Friederike
authors.initials: F
authors.lastname: Schmid
authors.affiliation: Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7-9, 55128 Mainz, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Speck
mesh_terms: D018407:Bacterial Physiological Phenomena; D002633:Chemotaxis; D008954:Models, Biological; D053038:Quorum Sensing