2000 character limit reached
Langevin formulation for single-file diffusion (0810.5210v1)
Published 29 Oct 2008 in cond-mat.stat-mech and cond-mat.soft
Abstract: We introduce a stochastic equation for the microscopic motion of a tagged particle in the single file model. This equation provides a compact representation of several of the system's properties such as Fluctuation-Dissipation and Linear Response relations, achieved by means of a diffusion noise approach. Most important, the proposed Langevin Equation reproduces quantitatively the \emph{three} temporal regimes and the corresponding time scales: ballistic, diffusive and subdiffusive.