Abstract
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 in general a non Gibbs form. The corresponding steady-state regime is analyzed in detail, by using a tagged particle together with a state-graph cycle expansion of the probability currents. As a consequence, the constants appearing in Lotka–Volterra equations—which describe the fluid limits of stationary states—can be traced back directly at the discrete level to tagged particle cycles coefficients. Current fluctuations are also studied and the Lagrangian is obtained via an iterative scheme. The related Hamilton–Jacobi equation, which leads to the large deviation functional, is investigated and solved in the reversible case, just for the sake of checking.
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Fayolle, G., Furtlehner, C. Stochastic Dynamics of Discrete Curves and Multi-Type Exclusion Processes. J Stat Phys 127, 1049–1094 (2007). https://doi.org/10.1007/s10955-007-9286-0
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DOI: https://doi.org/10.1007/s10955-007-9286-0