Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/192654
Title: | Small obstacle in a large polar flock |
Author: | Codina, Joan Mahault, Benoît Dobnikar, Jure Pagonabarraga Mora, Ignacio Shi, Xia-qing Chaté, Hugues |
Keywords: | Dinàmica molecular Matèria condensada tova Molecular dynamics Soft condensed matter |
Issue Date: | 23-May-2022 |
Publisher: | American Physical Society |
Abstract: | We show that arbitrarily large polar flocks are susceptible to the presence of a single small obstacle. In a wide region of parameter space, the obstacle triggers counterpropagating dense bands leading to reversals of the flow. In very large systems, these bands interact, yielding a never-ending chaotic dynamics that constitutes a new disordered phase of the system. While most of these results were obtained using simulations of aligning self-propelled particles, we find similar phenomena at the continuous level, not when considering the basic Toner-Tu hydrodynamic theory, but in simulations of truncations of the relevant Boltzmann equation. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.128.218001 |
It is part of: | Physical Review Letters, 2022, vol. 128, num. 21, p. 218001-1 -218001-6 |
URI: | http://hdl.handle.net/2445/192654 |
Related resource: | https://doi.org/10.1103/PhysRevLett.128.218001 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física de la Matèria Condensada) |
Files in This Item:
File | Description | Size | Format | |
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727081.pdf | 1.21 MB | Adobe PDF | View/Open |
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