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DY: Fachverband Dynamik und Statistische Physik
DY 33: Poster: Nonlinear Dynamics, Pattern Formation and Networks
DY 33.14: Poster
Wednesday, March 20, 2024, 15:00–18:00, Poster C
Dynamic patterns in active particles with delayed all-to-all attractions — •Pin-Chuan Chen1, Klaus Kroy1, and Viktor Holubec2 — 1Institute for Theoretical Physics, Universität Leipzig - 04103 Leipzig, Germany — 2Department of Macromolecular Physics, Faculty of Mathematics and Physics, Charles University 18000 Prague, Czech Republic
Time delayed effective interactions are ubiquitous in coarse-grained models of complex systems. Using Brownian dynamics simulations, we study a collection of active particles attracting each other with a time delay. In two dimensions, we find patterns similar to those reported previously [1,2] for a delayed attraction to a common center. For long delays, a more symmetric configuration arises. In three dimensions, the situation is somewhat similar, but due to the extra degree of freedom, the phenomenology is much richer. Beyond rotating crystallites, shear bands and co-orbiting satellites, conveyor belts with shapes of a tennis ball seam appear.
[1] Wang, X., Chen, P. C., Kroy, K., Holubec, V., & Cichos, F. (2023). Spontaneous vortex formation by microswimmers with retarded attractions. Nature Communications, 14(1), 56.
[2] Chen, P. C., Kroy, K. D., Cichos, F., Wang, X., & Holubec, V. (2023). Active particles with delayed attractions form quaking crystallites. Europhysics Letters.
Keywords: time delay; active particles