Linear response approach to active Brownian particles in time-varying activity fields
- Merlitz, Holger Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Dresden, Germany
- Vuijk, Hidde D. Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Dresden, Germany
- Brader, Joseph M. Department of Physics, University of Fribourg, Switzerland
- Sharma, Abhinav Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Dresden, Germany
- Sommer, Jens-Uwe Leibniz-Institut für Polymerforschung Dresden, Institut Theorie der Polymere, Dresden, Germany - Technische Universität Dresden, Institute of Theoretical Physics, Dresden, Germany
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21.05.2018
Published in:
- The Journal of Chemical Physics. - 2018, vol. 148, no. 19, p. 194116
English
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.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 322944
- DOI 10.1063/1.5025760
- Persistent URL
- https://folia.unifr.ch/unifr/documents/307174
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