Active particles with delayed attractions form quaking crystallites
Autor
Chen, Pin-chuan
Kroy, Klaus
Cichos, Frank
Datum vydání
2023Publikováno v
Europhysics LettersRočník / Číslo vydání
142 (6)ISBN / ISSN
ISSN: 0295-5075Metadata
Zobrazit celý záznamKolekce
Tato publikace má vydavatelskou verzi s DOI 10.1209/0295-5075/acd9ea
Abstrakt
- Perception-reaction delays have experimentally been found to cause a spontaneous circling of microswimmers around a fxed target particle. Here we investigate a many-body version of such an experiment with Brownian-dynamics simulations of active particles in a plane. For short delays, they form a hexagonal crystallite around the target. The bifurcation to a chiral dynamical phase, seen for longer delays, maps onto that for a single active particle. Different angular velocities at different distances from the target induce shear stresses that grow with increasing delay. By exciting shear bands, they shake and intermittently break the rotating crystallite. For long delays, it detaches from the target to circle around it near the preferred single-particle orbit as a compact spinning satellite, trembling from what could be called tidal quakes.
Klíčová slova
Active particles, delayed attractions, crystallites
Trvalý odkaz
https://hdl.handle.net/20.500.14178/2328Licence
Licence pro užití plného textu výsledku: Creative Commons Uveďte původ 4.0 International