| Autor: |
Bricard, Antoine, Jean-Baptiste-Caussin, Das, Debasish, Savoie, Charles, Chikkadi, Vijayakumar, Shitara, Kyohei, Chepizhko, Oleksandr, Peruani, Fernando, Saintillan, David, Bartolo, Denis |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Nature Communications 6, 7470 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1038/ncomms8470 |
| Popis: |
Coherent vortical motion has been reported in a wide variety of populations including living organisms (bacteria, fishes, human crowds) and synthetic active matter (shaken grains, mixtures of biopolymers), yet a unified description of the formation and structure of this pattern remains lacking. Here we report the self-organization of motile colloids into a macroscopic steadily rotating vortex. Combining physical experiments and numerical simulations, we elucidate this collective behavior. We demonstrate that the emergent-vortex structure lives on the verge of a phase separation, and single out the very constituents responsible for this state of polar active matter. Building on this observation, we establish a continuum theory and lay out a strong foundation for the description of vortical collective motion in a broad class of motile populations constrained by geometrical boundaries. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
