Dresden 2014 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 40: Poster - Quantum Systems/ Stat. Phys./ Diffusive Process

DY 40.29: Poster

Donnerstag, 3. April 2014, 17:00–19:00, P3

Collective behaviour of self-propelled particles with nematic alignment in three dimensions — •Rebekka Breier, Stephan Herminghaus, and Marco G. Mazza — Max-Planck-Institut für Dynamik und Selbstorganisation, Göttingen, Germany

In the field of active swimmers, numerical models with simple, local interaction rules are a powerful instrument to study collective phenomena of any type of self-propelled particles.

Here, we fill the gap of such a model in three dimensions with local nematic alignment and study the collective behaviour in large systems (up to 10⁶ particles in reasonable computational time). The system shows interesting collective states such as global nematic order, isotropic phase, coexistence of different phases, and density waves. We investigate these waves in detail, as they show a surprising symmetry breaking of the nematic interaction. Moreover, we examine the effects of spatial disorder by adding obstacles to the system. We study their influence on the collective behaviour of the self-propelled particles and, specifically, on the waves.