Lorentz forces induce inhomogeneity and flux in active systems

  • We consider the dynamics of a charged active Brownian particle in three dimensions subjected to an external magnetic field. We show that, in the presence of a field gradient, a macroscopic flux emerges from a flux-free system and the density distribution becomes inhomogeneous. The flux is induced by the gradient of the magnetic field only and does not require additional symmetry breaking such as density or potential gradients. This stands in marked contrast to similar phenomena in condensed matter such as the classical Hall effect. We further demonstrate that passive tracer particles can be used to measure the essential effects caused by the Lorentz force on the active particle bath, and we discuss under which conditions this diffusive Hall-like effect might be observed experimentally.

Download full text files

Export metadata

Statistics

Number of document requests

Additional Services

Share in Twitter Search Google Scholar
Metadaten
Author:Hidde D. VuijkORCiDGND, J. U. Sommer, H. Merlitz, J. M. Brader, Abhinav SharmaGND
URN:urn:nbn:de:bvb:384-opus4-1038847
Frontdoor URLhttps://opus.bibliothek.uni-augsburg.de/opus4/103884
ISSN:2643-1564OPAC
Parent Title (English):Physical Review Research
Publisher:American Physical Society (APS)
Place of publication:College Park, MD
Type:Article
Language:English
Year of first Publication:2020
Publishing Institution:Universität Augsburg
Release Date:2023/05/02
Tag:General Earth and Planetary Sciences; General Environmental Science
Volume:2
Issue:1
First Page:013320
DOI:https://doi.org/10.1103/physrevresearch.2.013320
Institutes:Mathematisch-Naturwissenschaftlich-Technische Fakultät
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik
Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Theoretische Physik II
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):CC-BY 4.0: Creative Commons: Namensnennung (mit Print on Demand)