Berlin 2018 – scientific programme

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BP: Fachverband Biologische Physik

BP 8: Active Matter DY II (joint session DY/CPP/BP)

BP 8.9: Talk

Monday, March 12, 2018, 17:45–18:00, BH-N 243

Active Brownian particles in a inhomogeneous activity or magnetic field — •Hidde Vuijk and Abhinav Sharma — Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, 01069 Dresden

We study spherically symmetric active particles in a spatially inhomogeneous activity or magnetic field. In both cases the particles spontaneously orient themselves, which results in an inhomogeneous distribution of particles. Using Green-Kubo approach we obtain analytical expression for the orientation of the particles. We find that the relevant equilibrium correlation function is the self-part of the Van Hove function, which can be approximated accurately. Density does not have a linear response to the activity; however, an expression for the density is derived by using the orientation as input to dynamic density functional theory. All theoretical predictions are validated using Brownian dynamics simulations.