title: Boundary effects in reaction-diffusion processes.
abstract: The effects of a boundary on reaction systems are examined in the framework of the general single-species reaction/coalescence process. The boundary naturally represents the reactants' container, but is applicable to exciton dynamics in a doped TMMC crystal. We show that a density excess, which extends into the system diffusively from the boundary, is formed in two dimensions and below. This implies a surprising result for the magnetization near a fixed spin in the coarsening of the one-dimensional critical Ising model. The universal, dimensionally dependent functional forms of this density excess are given by an exact solution and the field-theoretic renormalization group.
authors.affiliation: Department of Physics of Complex Systems, The Weizmann Institute of Science, Rehovot 76100, Israel.
authors.forename: M J
authors.initials: MJ
authors.lastname: Richardson
authors.forename: Y
authors.initials: Y
authors.lastname: Kafri