
In this paper, for the first time a theory is formulated that predicts velocity and spatial correlations between occupation numbers that occur in lattice gas automata violating semi-detailed balance. Starting from a coupled BBGKY hierarchy for the $n$-particle distribution functions, cluster expansion techniques are used to derive approximate kinetic equations. In zeroth approximation the standard nonlinear Boltzmann equation is obtained; the next approximation yields the ring kinetic equation, similar to that for hard sphere systems, describing the time evolution of pair correlations. As a quantitative test we calculate equal time correlation functions in equilibrium for two models that violate semi-detailed balance. One is a model of interacting random walkers on a line, the other one is a two-dimensional fluid type model on a triangular lattice. The numerical predictions agree very well with computer simulations.
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non-Gibbs states, Cellular Automata and Lattice Gases (nlin.CG), Kinetic theory of gases in time-dependent statistical mechanics, lattice gas automata, Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.), FOS: Physical sciences, Dynamics of random walks, random surfaces, lattice animals, etc. in time-dependent statistical mechanics, static pair correlations, BBGKY hierarchy, Numerical methods of time-dependent statistical mechanics, Particle methods and lattice-gas methods, lack of detailed balance, Nonlinear Sciences - Cellular Automata and Lattice Gases
non-Gibbs states, Cellular Automata and Lattice Gases (nlin.CG), Kinetic theory of gases in time-dependent statistical mechanics, lattice gas automata, Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.), FOS: Physical sciences, Dynamics of random walks, random surfaces, lattice animals, etc. in time-dependent statistical mechanics, static pair correlations, BBGKY hierarchy, Numerical methods of time-dependent statistical mechanics, Particle methods and lattice-gas methods, lack of detailed balance, Nonlinear Sciences - Cellular Automata and Lattice Gases
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