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000018668 084__ $$2WoS$$aPhysics, Multidisciplinary
000018668 1001_ $$0P:(DE-Juel1)VDB93438$$aNarasimhan, S.L.$$b0$$uFZJ
000018668 245__ $$aDynamics of a stochastically driven Brownian particle in one dimension
000018668 260__ $$aAmsterdam$$bNorth Holland Publ. Co.$$c2012
000018668 300__ $$a593 - 605
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000018668 520__ $$aWe 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.
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000018668 65320 $$2Author$$aBrownian ratchet
000018668 65320 $$2Author$$aDriven dynamics
000018668 65320 $$2Author$$aSubdiffusion
000018668 65320 $$2Author$$aNon-equilibrium fluctuation
000018668 7001_ $$0P:(DE-Juel1)VDB17756$$aBaumgaertner, A.$$b1$$uFZJ
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