Merlitz, Holger Vuijk, Hidde D. Brader, Joseph M. Sharma, Abhinav Sommer, Jens-Uwe 2018-05-21 In a theoretical and simulation study, active Brownian particles (ABPs) in three- dimensional bulk systems are exposed to time-varying sinusoidal activity waves that are running through the system. A linear response (Green-Kubo) formalism is applied to derive fully analytical expressions for the torque-free polarization profiles of non- interacting particles. The activity waves induce fluxes that strongly depend on the particle size and may be employed to de-mix mixtures of ABPs or to drive the particles into selected areas of the system. Three-dimensional Langevin dynamics simulations are carried out to verify the accuracy of the linear response formalism, which is shown to work best when the particles are small (i.e., highly Brownian) or operating at low activity levels. application/pdf https://folia.unifr.ch/global/documents/307174 https://folia.unifr.ch/documents/307174/files/bra_lra.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1063/1.5025760 info:eu-repo/semantics/openAccess License undefined The Journal of Chemical Physics. - 2018, vol. 148, no. 19, p. 194116 info:eu-repo/classification/udc/53 Linear response approach to active Brownian particles in time-varying activity fields http://purl.org/coar/resource_type/c_6501