Emergence of Collective Motion in a Model of Interacting Brownian Particles

Victor Dossetti and Francisco J. Sevilla
Phys. Rev. Lett. 115, 058301 – Published 29 July 2015

Abstract

By studying a system of Brownian particles that interact among themselves only through a local velocity-alignment force that does not affect their speed, we show that self-propulsion is not a necessary feature for the flocking transition to take place as long as underdamped particle dynamics can be guaranteed. Moreover, the system transits from stationary phases close to thermal equilibrium, with no net flux of particles, to far-from-equilibrium ones exhibiting collective motion, phase coexistence, long-range order, and giant number fluctuations, features typically associated with ordered phases of models where self-propelled particles with overdamped dynamics are considered.

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  • Received 11 October 2014

DOI:https://doi.org/10.1103/PhysRevLett.115.058301

© 2015 American Physical Society

Authors & Affiliations

Victor Dossetti1,2,3,* and Francisco J. Sevilla4,†

  • 1CIDS-Instituto de Ciencias, Benemérita Universidad Autónoma de Puebla, Av. San Claudio esq. 14 Sur, Edif. 103D, Puebla, Pue. 72570, Mexico
  • 2Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla, Puebla 72570, Mexico
  • 3Consortium of the Americas for Interdisciplinary Science, University of New Mexico, Albuquerque, New Mexico 87131, USA
  • 4Instituto de Física, Universidad Nacional Autónoma de México, Apdo. Postal 20-364, 01000 México D.F., Mexico

  • *dossetti@ifuap.buap.mx, vdossetti@gmail.com
  • fjsevilla@fisica.unam.mx

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Issue

Vol. 115, Iss. 5 — 31 July 2015

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