Stochastic Dynamics of Discrete Curves and Multi-type Exclusion Processes

Details Stochastic Dynamics of Discrete Curves and Multi-type Exclusion Processes Stochastic Dynamics of Discrete Curves and Multi-type Exclusion Processes

2006-03-09

arxiv.org/abs/cond-mat/0603250v2

J. Stat. Phys. Vol.127, No 5 (2007), 1049-1094

Physics

Condensed Matter

Statistical Mechanics

Short version of Inria Reasearch Report, 33 pages, 6 figures. submited to J.Stat.Phys

Scientific paper

10.1007/s10955-007-9286-0

This study deals with continuous limits of interacting one-dimensional diffusive systems, arising from stochastic distortions of discrete curves with various kinds of coding representations. These systems are essentially of a reaction-diffusion nature. In the non-reversible case, the invariant measure has generally a non Gibbs form. The corresponding steady-state regime is analyzed in detail with the help of a tagged particle and a state-graph cycle expansion of the probability currents. As a consequence, the constants appearing in Lotka-Volterraequations --which describe the fluid limits of stationary states-- can be traced back directly at the discrete level to tagged particles cycles coefficients. Current fluctuations are also studied and the Lagrangian is obtained by an iterative scheme. The related Hamilton-Jacobi equation, which leads to the large deviation functional, is analyzed and solved in the reversible case for the sake of checking.

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