Journal Article

PreJuSER-18668

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dynamics of a stochastically driven Brownian particle in one dimension

Narasimhan, S. L.FZJ* ; Baumgaertner, A.FZJ*

2012
North Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.physa.2011.08.016

Abstract: We present a study on the dynamics of a system consisting of a pair of hardcore particles diffusing with different rates. We solved the drift-diffusion equation for this model in the case when one particle, labeled F, drifts and diffuses slowly toward the second particle, labeled M. The displacements of particle M exhibits a crossover from diffusion to drift at a characteristic time which depends on the rate constants. We show that the positional fluctuation of M exhibits an intermediate crossover regime of subdiffusion separating initial and asymptotic diffusive behavior; this is in agreement with the complete set of Master Equations that describe the stochastic evolution of the model. The intermediate crossover regime can be considerably large depending on the hopping probabilities of the two particles. This is in contrast to the known crossover from diffusive to subdiffusive behavior of a tagged particle that is in the interior of a large single-file system on an unbound real line. We discuss our model with respect to the biological phenomena of membrane protrusions, where polymerizing actin filaments (F) push the cell membrane (M). (C) 2011 Elsevier B.V. All rights reserved.

Keyword(s): J ; Brownian ratchet (auto) ; Driven dynamics (auto) ; Subdiffusion (auto) ; Non-equilibrium fluctuation (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Theorie der weichen Materie und Biophysik (ICS-2)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (P45)

Appears in the scientific report 2012

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Database coverage:
; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection ; Zoological Record

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