Dresden 2020 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 41: Active Matter V (joint session DY/BP/CPP)

BP 41.3: Vortrag

Freitag, 20. März 2020, 10:30–10:45, ZEU 160

Active Brownian particles show motility-induced spatially periodic patterns — •Samuel Grimm¹, Andreas Fischer², Thomas Speck², and Walter Zimmermann¹ — ¹Theoretische Physik I, Universität Bayreuth, 95440 Bayreuth, Germany — ²Physics Institute, University of Mainz, 55099 Mainz, Germany

We suggest and investigate a model for active Brownian particles, that shows motility induced pattern formation. We complement a model of motility induced phase separation (MIPS) [J. Chem. Phys. 142, 224149 (2015)] by the dynamics of auto-inducer molecules. This results in a prototype model for spatially periodic patterns under conservation constraints, here the conservation of Brownian particles. By increasing the chemotactic sensitivity of active Brownian particles a transition from MIPS to motility induced periodic patterns takes place. They are found in a wide parameter range. Besides the phase diagrams for the onset of spatially periodic patterns also their nonlinear behavior beyond onset is investigated for selected parameter ranges.