Fore-aft asymmetric flocking
Abstract
We show that fore-aft asymmetry, a generic feature of living organisms and some active matter systems, can have a strong influence on the collective properties of even the simplest flocking models. Specifically, an arbitrarily weak asymmetry favoring front neighbors changes qualitatively the phase diagram of the Vicsek model. A region where many sharp traveling band solutions coexist is present at low noise strength, below the Toner-Tu liquid, at odds with the phase-separation scenario well describing the usual isotropic model. Inside this region, a "banded-liquid" phase with algebraic density distribution coexists with band solutions. Linear stability analysis at the hydrodynamic level suggests that these results are generic and not specific to the Vicsek model.
- Publication:
-
Physical Review E
- Pub Date:
- August 2017
- DOI:
- 10.1103/PhysRevE.96.020601
- arXiv:
- arXiv:1711.01225
- Bibcode:
- 2017PhRvE..96b0601C
- Keywords:
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- Condensed Matter - Soft Condensed Matter
- E-Print:
- 6 pages, 5 figures