|
Authors
|
Shinde, R. ; Sommer, J.-U. ; Löwen, H. ; Sharma, A.
|
|
Title
|
Strongly enhanced dynamics of a charged Rouse dimer by an external magnetic field
|
|
Date
|
23.07.2022
|
|
Number
|
59795
|
|
Abstract
|
While the dynamics of dimers and polymer chains in a viscous solvent is well understood within the celebrated Rouse model, the effect of an external magnetic field on the dynamics of a charged chain is much less understood. Here, we generalize the Rouse model for a charged dimer to include the effect of an external magnetic field. Our analytically solvable model allows a fundamental insight into the magneto-generated dynamics of the dimer in the overdamped limit as induced by the Lorentz force. Surprisingly, for a dimer of oppositely charged particles, we find an enormous enhancement of the dynamics of the dimer center, which exhibits even a transient superballistic behavior. This is highly unusual in an overdamped system for there is neither inertia nor any internal or external driving. We attribute this to a significant translation and rotation coupling due to the Lorentz force. We also find that magnetic field reduces the mobility of a dimer along its orientation and its effective rotational diffusion coefficient. In principle, our predictions can be tested by experiments with colloidal particles and complex plasmas.
|
|
Publisher
|
PNAS Nexus
|
|
Wikidata
|
|
|
Citation
|
PNAS Nexus 1 (2022) 1-9
|
|
DOI
|
https://doi.org/10.1093/PNASNEXUS/PGAC119
|
|
Tags
|
|
