SOLVABLE MODEL OF SPATIOTEMPORAL CHAOS

A continuous time dynamic model of a d-dimensional lattice of coupled localized m-component chaotic elements is solved exactly in the limit m --> infinity. A self-consistent nonlinear partial differential equat ion for the correlations in space and time is derived. Near the onset of spatiotemporal disorder there are solutions that exhibit a novel sp ace-time symmetry: the corresponding correlations axe invariant to rot ations in the d+1 space-time variables. For d < 3 the correlations dec ay exponentially at large distances or long times. For d greater-than- or-equal-to 3 the correlations exhibit a power law decay as the invers e of the distance or time.