TY  - JOUR
AU  - Narasimhan, S.L.
AU  - Baumgaertner, A.
TI  - Dynamics of a stochastically driven Brownian particle in one dimension
JO  - Physica / A
VL  - 391
SN  - 0378-4371
CY  - Amsterdam
PB  - North Holland Publ. Co.
M1  - PreJuSER-18668
SP  - 593 - 605
PY  - 2012
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000297779500018
DO  - DOI:10.1016/j.physa.2011.08.016
UR  - https://juser.fz-juelich.de/record/18668
ER  -