Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2003-07-28
New J. Phys. {\bf 5}, 145.1-145.14 (2003)
Physics
Condensed Matter
Statistical Mechanics
27 pages
Scientific paper
10.1088/1367-2630/5/1/145
We obtain exact travelling wave solutions for three families of stochastic one-dimensional nonequilibrium lattice models with open boundaries. These solutions describe the diffusive motion and microscopic structure of (i) of shocks in the partially asymmetric exclusion process with open boundaries, (ii) of a lattice Fisher wave in a reaction-diffusion system, and (iii) of a domain wall in non-equilibrium Glauber-Kawasaki dynamics with magnetization current. For each of these systems we define a microscopic shock position and calculate the exact hopping rates of the travelling wave in terms of the transition rates of the microscopic model. In the steady state a reversal of the bias of the travelling wave marks a first-order non-equilibrium phase transition, analogous to the Zel'dovich theory of kinetics of first-order transitions. The stationary distributions of the exclusion process with $n$ shocks can be described in terms of $n$-dimensional representations of matrix product states.
Jafarpour Farhad H.
Krebs Klaus
Schütz Gunter M.
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