Exact solution of a class of one-dimensional nonequilibrium stochastic models

Details Exact solution of a class of one-dimensional nonequilibrium stochastic models Exact solution of a class of one-dimensional nonequilibrium stochastic models

2001-01-12

arxiv.org/abs/cond-mat/0101190v3

Physics

Condensed Matter

Statistical Mechanics

14 pages, no figures. To appear in Physical Review E (2001)

Scientific paper

10.1103/PhysRevE.63.056112

We consider various one-dimensional non-equilibrium models, namely the {\it diffusion-limited pair-annihilation and creation model} (DPAC) and its unbiased version (the Lushnikov's model), the DPAC model with particle injection (DPACI), as well as (biased) diffusion-limited coagulation model (DC). We study the DPAC model using an approach based on a duality transformation and the generating function of the dual model. We are able to compute exactly the density and correlation functions in the general case with arbitrary initial states. Further, we assume that a source injects particles in the system. Solving, via the duality transformation, the equations of motions of the density and the non-instantaneous two-point correlation functions, we see how the source affects the dynamics. Finally we extend the previous results to the DC model with help of a {\it similarity transformation}.

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