Equilibrium and dynamical behavior in the Vicsek model for self-propelled particles under shear

• Authors: Gustavo Saracco , Giuseppe Gonnella , Davide Marenduzzo , Enzo Orlandini
• Languages of publication: EN

Abstracts

EN

The effects of an externally imposed linear shear profile in the Vicsek model of self-propelled particles is investigated via computer simulations. We find that the applied field changes in a relevant way both the equilibrium and dynamical properties of the original model. Indeed, short time dynamics analysis shows that the order-disordered phase transition disappears under shear, because the flow acts as a symmetry breaking field. Moreover, the coarsening of particle domains is arrested at a characteristic length-scale inversely proportional to shear rate. A generalization of the original Vicsek model where the velocity of particles depends on the local value of the density is also introduced and shows to affect the domain formation.

Keywords

EN

active matter; non-equilibrium physics

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2012
• Volume: 10
• Issue: 5
• Pages: 1109-1115

Dates

published

1 - 10 - 2012

online

21 - 11 - 2012

Contributors

author

Gustavo Saracco

• Instituto de Investigaciones Fisicoquímicas y Aplicadas (INIFTA), CCT La Plata, CONICET, UNLP, Casilla de Correo 16, Sucursal 4, 1900, La Plata, Argentina

author

Giuseppe Gonnella

• Dipartimento di Fisica and Sezione INFN di Bari, Universita’ di Bari, I-70126, Bari, Italy

author

Davide Marenduzzo

• SUPA, School of Physics and Astronomy, University of Edinburgh, Mayfield Road, Edinburgh, EH9 3JZ, UK

author

Enzo Orlandini

• Dipartimento di Fisica and Sezione INFN di Padova, Universita’ di Padova, Via Marzolo 8, 35131, Padova, Italy

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Identifiers

DOI

10.2478/s11534-012-0111-2