title: Emergent Structural Mechanisms for High-Density Collective Motion Inspired by Human Crowds.
abstract: Collective motion of large human crowds often depends on their density. In extreme cases like heavy metal concerts and black Friday sales events, motion is dominated by physical interactions instead of conventional social norms. Here, we study an active matter model inspired by situations when large groups of people gather at a point of common interest. Our analysis takes an approach developed for jammed granular media and identifies Goldstone modes, soft spots, and stochastic resonance as structurally driven mechanisms for potentially dangerous emergent collective motion.
authors.affiliation: Mathematics Department, Uppsala University, Lägerhyddsvägen 1, Uppsala 75106, Sweden.
authors.forename: Arianna
authors.initials: A
authors.lastname: Bottinelli
authors.affiliation: Mathematics Department, Uppsala University, Lägerhyddsvägen 1, Uppsala 75106, Sweden.
authors.forename: David T J
authors.initials: DT
authors.lastname: Sumpter
authors.affiliation: Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, USA.
authors.forename: Jesse L
authors.initials: JL
authors.lastname: Silverberg
mesh_terms: D055598:Chemical Phenomena; D003441:Crowding; D003617:Dangerous Behavior; D006801:Humans; D008962:Models, Theoretical; D009038:Motion