Regensburg 2022 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 4: Active Matter 1 (joint session BP/CPP/DY)

BP 4.6: Vortrag

Montag, 5. September 2022, 12:15–12:30, H16

Emergent collective behavior of active Brownian particles with visual perception — •Rajendra Singh Negi, Roland G. Winker, and Gerhard Gompper — Theoretical Physics of Living Matter, Institute of Biological Information Processing (IBI-5), Forschungszentrum Jülich, 52425 Jülich, Germany

Collective behavior of self-propelled agents emerges from the dynamic response of individuals to various input signals [1,2]. One such input signal is visual perception. We explore the behavior of a model of self-steering active Brownian particles with visual perception in two dimensions [3]. Several non-equilibrium structures like motile worms, worm-aggregate coexistence, aggregates, and a dilute-gas phase are obtained, depending on the system parameters. The strength of the response to the visual signal, vision angle, packing fraction,rotational diffusion, and activity (velocity v₀) determine the location and extent of these phases in the phase diagram. The radius-of-gyration tensor is used to distinguish between the worm and the aggregate phase. Our results help to understand the collective behavior of cognitive self-propelled particles, like animal herds and micro-robotic swarms.

[1]. J. Elgeti, R. G. Winkler, and G. Gompper, Rep. Prog. Phys. 78, 056601 (2015).

[2]. M. R. Shaebani, A. Wysocki, R. G. Winkler, G. Gompper, and H. Rieger, Nat. Rev. Phys. 2, 181 (2020).

[3]. L. Barberis and F. Peruani, Phys. Rev. Lett. 117, 248001 (2016).