Collective behaviors of self-propelled particles with tunable alignment angles

Abstract

We present a novel aligning active matter model by extending the nematic alignment rule in self-propelled rods to tunable alignment angles, as represented by collision of cone-shaped particles. Non-vanishing alignment angles introduce frustration in the many-body interactions, and we investigate its effect on the collective behavior of the system. Through numerical simulations of an agent-based microscopic model, we found that the system exhibits distinct phenomenology compared to the original self-propelled rods. In particular, anti-parallel bands are observed in an intermediate parameter range. The linear stability analysis of the continuum description derived from the Boltzmann approach demonstrates qualitative consistency with the microscopic model, while frustration due to many-body interactions in the latter destabilizes homogeneous nematic order over a wide range of the alignment angle.

7 pages, 5 figures

References in corpus (18)

• Novel type of phase transition in a system of self-driven particles
• Active Particles in Complex and Crowded Environments
• Collective motion
• Collective motion of self-propelled particles interacting without cohesion
• Large-scale collective properties of self-propelled rods
• Boltzmann and hydrodynamic description for self-propelled particles
• Collective motion and nonequilibrium cluster formation in colonies of gliding bacteria
• Hydrodynamic equations for self-propelled particles: microscopic derivation and stability analysis
• Flocking at a distance in active granular matter
• Self-Propelled Rods: Insights and Perspectives for Active Matter
• Minimal model for active nematics: quasi-long-range order and giant fluctuations
• The Rotating Vicsek Model: Pattern Formation and Enhanced Flocking in Chiral Active Matter
• Long-range nematic order and anomalous fluctuations in suspensions of swimming filamentous bacteria
• Active Curved Polymers form Vortex Patterns on Membranes
• Pattern-induced local symmetry breaking in active matter systems
• Traveling Bands, Clouds, and Vortices of Chiral Active Matter
• Active Matter Class with Second-Order Transition to Quasi-Long-Range Polar Order
• Self-propelled chimeras