Relative distance between tracers as a measure of diffusivity within moving aggregates

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Poenisch W, Zaburdaev V
Zeitschrift: European Physical Journal B
Verlag: SPRINGER
Jahr der Veröffentlichung: 2018
Band: 91
Heftnummer: 2
ISSN: 1434-6028


Abstract

Tracking of particles, be it a passive tracer or an actively moving bacterium in the growing bacterial colony, is a powerful technique to probe the physical properties of the environment of the particles. One of the most common measures of particle motion driven by fluctuations and random forces is its diffusivity, which is routinely obtained by measuring the mean squared displacement of the particles. However, often the tracer particles may be moving in a domain or an aggregate which itself experiences some regular or random motion and thus masks the diffusivity of tracers. Here we provide a method for assessing the diffusivity of tracer particles within mobile aggregates by measuring the so-called mean squared relative distance (MSRD) between two tracers. We provide analytical expressions for both the ensemble and time averaged MSRD allowing for direct identification of diffusivities from experimental data.


Zusätzliche Organisationseinheit(en)
Lehrstuhl für Mathematik in den Lebenswissenschaften


Einrichtungen weiterer Autorinnen und Autoren

Max-Planck-Institut für Physik komplexer Systeme (MPI PKS) / Max Planck Institute for the Physics of Complex Systems


Zitierweisen

APA:
Poenisch, W., & Zaburdaev, V. (2018). Relative distance between tracers as a measure of diffusivity within moving aggregates. European Physical Journal B, 91(2). https://dx.doi.org/10.1140/epjb/e2017-80347-5

MLA:
Poenisch, Wolfram, and Vasily Zaburdaev. "Relative distance between tracers as a measure of diffusivity within moving aggregates." European Physical Journal B 91.2 (2018).

BibTeX: 

Zuletzt aktualisiert 2019-07-02 um 13:08