Levis, D. ; Liebchen, B. (2018)
Micro-flock patterns and macro-clusters in chiral active Brownian disks.
In: J. Phys. Condens. Matter, 30 (8)
doi: 10.1088/1361-648X/aaa5ec
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Chiral active particles (or self-propelled circle swimmers) feature a rich collective behavior, comprising rotating macro-clusters and micro-flock patterns which consist of phase-synchronized rotating clusters with a characteristic self-limited size. These patterns emerge from the competition of alignment interactions and rotations suggesting that they might occur generically in many chiral active matter systems. However, although excluded volume interactions occur naturally among typical circle swimmers, it is not yet clear if macro-clusters and micro-flock patterns survive their presence. The present work shows that both types of pattern do survive but feature strongly enhance fluctuations regarding the size and shape of the individual clusters. Despite these fluctuations, we find that the average micro-flock size still follows the same characteristic scaling law as in the absence of excluded volume interactions, i.e. micro-flock sizes scale linearly with the single-swimmer radius.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Levis, D. ; Liebchen, B. |
| Art des Eintrags: | Bibliographie |
| Titel: | Micro-flock patterns and macro-clusters in chiral active Brownian disks |
| Sprache: | Englisch |
| Publikationsjahr: | 30 Januar 2018 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | J. Phys. Condens. Matter |
| Jahrgang/Volume einer Zeitschrift: | 30 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1088/1361-648X/aaa5ec |
| Kurzbeschreibung (Abstract): | Chiral active particles (or self-propelled circle swimmers) feature a rich collective behavior, comprising rotating macro-clusters and micro-flock patterns which consist of phase-synchronized rotating clusters with a characteristic self-limited size. These patterns emerge from the competition of alignment interactions and rotations suggesting that they might occur generically in many chiral active matter systems. However, although excluded volume interactions occur naturally among typical circle swimmers, it is not yet clear if macro-clusters and micro-flock patterns survive their presence. The present work shows that both types of pattern do survive but feature strongly enhance fluctuations regarding the size and shape of the individual clusters. Despite these fluctuations, we find that the average micro-flock size still follows the same characteristic scaling law as in the absence of excluded volume interactions, i.e. micro-flock sizes scale linearly with the single-swimmer radius. |
| Freie Schlagworte: | Brownian dynamics,active matter,clustering,pattern formation, publiziert |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Festkörperphysik (2021 umbenannt in Institut für Physik Kondensierter Materie (IPKM)) |
| Hinterlegungsdatum: | 27 Mai 2019 13:09 |
| Letzte Änderung: | 19 Aug 2020 10:36 |
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