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Reichert, Julian and Voigtmann, Thomas (2021) Tracer Dynamics in Crowded Active-Particle Suspensions. Soft Matter, 17, pp. 10492-10504. Royal Society of Chemistry. doi: 10.1039/D1SM01092A. ISSN 1744-683X.
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Abstract
We discuss the dynamics of active Brownian particles (ABPs) in crowded environments through the mean-squared displacement (MSD) of active and passive tracer particles in both active and passive host systems. Exact equations for the MSD are derived using a projection operator technique, extending to dense systems the known solution for a single ABP. The interaction of the tracer particle with the host particles gives rise to strong memory effects. Evaluating these approximately in the framework of a recently developed mode-coupling theory for active Brownian particles (ABP-MCT), we discuss the various dynamical regimes that emerge: While self-propelled motion gives rise to super-diffusive MSD, at high densities, this competes with an interaction-induced sub-diffusive regime. The predictions of the theory are shown to be in good agreement with results obtained from an event-driven Brownian dynamics (ED-BD) simulation scheme for the dynamics of two-dimensional active Brownian hard disks.
| Item URL in elib: | https://elib.dlr.de/147980/ | |||||||||
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| Document Type: | Article | |||||||||
| Title: | Tracer Dynamics in Crowded Active-Particle Suspensions | |||||||||
| Authors: |
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| Date: | 2021 | |||||||||
| Journal or Publication Title: | Soft Matter | |||||||||
| Refereed publication: | Yes | |||||||||
| Open Access: | Yes | |||||||||
| Gold Open Access: | No | |||||||||
| In SCOPUS: | Yes | |||||||||
| In ISI Web of Science: | Yes | |||||||||
| Volume: | 17 | |||||||||
| DOI: | 10.1039/D1SM01092A | |||||||||
| Page Range: | pp. 10492-10504 | |||||||||
| Publisher: | Royal Society of Chemistry | |||||||||
| ISSN: | 1744-683X | |||||||||
| Status: | Published | |||||||||
| Keywords: | glass transition, active Brownian particles ABP, mode coupling theory, mean squared displacement | |||||||||
| HGF - Research field: | Aeronautics, Space and Transport | |||||||||
| HGF - Program: | Space | |||||||||
| HGF - Program Themes: | Research under Space Conditions | |||||||||
| DLR - Research area: | Raumfahrt | |||||||||
| DLR - Program: | R FR - Research under Space Conditions | |||||||||
| DLR - Research theme (Project): | R - Material Design and New Materials | |||||||||
| Location: | Köln-Porz | |||||||||
| Institutes and Institutions: | Institute of Materials Physics in Space | |||||||||
| Deposited By: | Voigtmann, Dr.rer.nat. Thomas | |||||||||
| Deposited On: | 10 Jan 2022 13:22 | |||||||||
| Last Modified: | 10 Jan 2022 13:22 |
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