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: | 23 Oct 2023 08:43 |
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