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- W3100993928 abstract "Many active matter systems, especially on the microscopic scale, are well approximated as overdamped, meaning that any inertial momentum is immediately dissipated by the environment. On the other hand, especially for macroscopic active systems but also for many mesoscopic systems the time scale of inertial motion can become large enough to be relevant for the dynamics. This raises the question how collective dynamics and the resulting states in active matter are influenced by inertia. Therefore, we propose a coarsegrained continuum model for underdamped active matter based on a mean field description for passive systems. Furthermore, we apply the model to a system with interactions that support an alignment on short distances and an antialignment on longer length scales as known in the context of pattern formation due to orientational interactions. Our numerical calculations of the underand overdamped dynamics both predict a structured laning state. However, activity induced convective flows that are only present in the underdamped model destabilize this state when the anti-alignment is weakened, leading to a collective motion state which does not occur in the overdamped limit. A turbulent transition regime between the two states can be characterized by strong density fluctuations and the absence of global ordering." @default.
- W3100993928 created "2020-11-23" @default.
- W3100993928 creator A5044630465 @default.
- W3100993928 creator A5076365428 @default.
- W3100993928 date "2020-05-11" @default.
- W3100993928 modified "2023-10-02" @default.
- W3100993928 title "Mean field approach of dynamical pattern formation in underdamped active matter with short-ranged alignment and distant anti-alignment interactions" @default.
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- W3100993928 doi "https://doi.org/10.1088/1361-648x/ab849b" @default.
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