Universality in Two Classes of Reaction–Diffusion Systems
نویسندگان
چکیده
We investigate the asymptotic properties of two reaction–diffusion systems. The first is an annihilation/scattering system with the reactions 2A → ∅, 2A → 2B, 2B → 2A, and 2B → ∅. The second one consists of competing annihilation and fission processes, 2A → ∅ and 2A → (n+2)A. We find that both these diffusion–limited reaction systems belong to the same universality class as the single species annihilation 2A → ∅. We discuss the implications of our analysis for a recent study of an active/absorbing transition in a system with multiplicative noise. PACS Numbers: 02.50. -r, 05.40. +j, 82.20. -w.
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