State-dependent diffusion in a periodic potential for a nonequilibrium open system

J. R. Chaudhuri () and D. Barik ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 63, issue 1, 117-126

Abstract: The state dependent diffusion concerns with the Brownian motion of a particle in inhomogeneous media. Based on a system reservoir nonlinear coupling model, when the bath is modulated by an external Gaussian random noise with arbitrary decaying correlation time, we present a microscopic approach to state dependent diffusion and multiplicative noise for an open nonequilibrium system in terms of Langevin description and associated Fokker-Planck equation in position space in the overdamped limit. We examine the thermodynamic consistency and explore the possibility of observing a phase induced current as a consequence of state dependent diffusion and finite correlation time of external noise. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 05.40.-a Fluctuation phenomena; random processes; noise; and Brownian motion; 05.60.-k Transport processes; 02.50.Ey Stochastic processes (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00211-1

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