Berlin 2015 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 27: Statistical Physics far from Thermal Equilibrium - Part I
DY 27.9: Vortrag
Mittwoch, 18. März 2015, 12:00–12:15, BH-N 334
Phase Behaviour of Active Swimmers in Depletants — •Benjamin Trefz1,2, Subir Das3, Sergei Egorov4, Peter Virnau2, and Kurt Binder2 — 1Graduate School Material Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany — 2Johannes Gutenberg University Mainz, Department of Physics, Staudingerweg 7, 55128 Mainz, Germany — 3Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India — 4Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901, USA
We study the structure and phase behaviour of a binary mixture where one of the components is self-propelling in nature. The inter-particle interactions in the system were taken from the Asakura-Oosawa model, for colloid-polymer mixtures, for which the phase diagram is known. In the current model version the colloid particles were made active using the Vicsek model for self-propelling particles. The resultant active system was studied by molecular dynamics methods with a Langevin thermostat. The Vicsek model based activity facilitates phase separation, and is thus broadening the coexistence region. Our findings have been published recently in [1].
[1] Subir K. Das, Sergei A. Egorov, Benjamin Trefz, Peter Virnau, and Kurt Binder, Phys. Rev. Lett., "Phase Behavior of Active Swimmers in Depletants: Molecular Dynamics and Integral Equation Theory", 2014