BPCPPDYSOE21 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 20: Complex Fluids and Soft Matter 2 (joint session DY/CPP)
CPP 20.6: Vortrag
Mittwoch, 24. März 2021, 12:40–13:00, DYa
Full phase diagram of continuous-time self-propelled particle models with alignment interaction — •Yinong Zhao1, Pawel Romanczuk1, and Cristian Huepe2,3 — 1Institute of Theoretical Biology, Department of Biology, Humboldt Universität zu Berlin — 2CHuepe Labs, 2713 West Haddon Ave #1, Chicago, IL 60622, USA — 3Northwestern Institute on Complex Systems and ESAM, Northwestern University, Evanston, IL 60208, USA
Self-propelled particle (SPP) models are widely used for exploring emergence of collective motion in nature. Despite the significant advances over the past decades in understanding self-organized active matter, many questions remain open about the general phase space of Vicsek-like alignment models and the regions of validity of corresponding analytical theories. We investigate a set of different continuous-time SPP-models with alignment interactions. We find that all these models share qualitatively the same phase diagram. Focusing on one of them, we identify three homogeneous states with long-range orientational order, that can be distinguished using statistical approaches. We tested the predictions of the Toner-Tu theory on these states and show that they do not hold for all three of them. Furthermore, we also phenomenologically explore the role of positional repulsion on the emergent spatial structure. Our study provides a broad, over-arching perspective on continuous-time alignment-based SPP model.