Polar vs. apolar alignment in systems of polar self-propelled particles

Abstract

The symmetry of the alignment mechanism in systems of polar self-propelled particles determines the possible macroscopic large-scale patterns that can emerge. Here we compare polar and apolar alignment. These systems share some common features like giant number fluctuations in the ordered phase and self-segregation in the form of bands near the onset of orientational order. Despite these similarities, there are essential differences like the symmetry of the ordered phase and the stability of the bands.

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• Towards a quantitative kinetic theory of polar active matter
• Enhanced persistence and collective migration in cooperatively aligning cell clusters
• Formation and collision of traveling bands in interacting deformable self-propelled particles
• Hysteresis, reentrance, and glassy dynamics in systems of self-propelled rods
• The microscopic phase density functional approach to the construction of the kinetic and hydrodynamic description for the system of self-propelled particles
• Gaussian theory for spatially distributed self-propelled particles
• Collective dynamics of active filament complexes