title: Persistence in one-dimensional Ising models with parallel dynamics.
abstract: We study persistence in one-dimensional ferromagnetic and antiferromagnetic nearest-neighbor Ising models with parallel dynamics. The probability P(t) that a given spin has not flipped up to time t, when the system evolves from an initial random configuration, decays as P(t) approximately 1/t(straight theta(p)) with straight theta(p) approximately 0.75 numerically. A mapping to the dynamics of two decoupled A+A-->0 models yields straight theta(p)=3/4 exactly. A finite size scaling analysis clarifies the nature of dynamical scaling in the distribution of persistent sites obtained under this dynamics.
authors.affiliation: The Institute of Mathematical Sciences, C.I.T. Campus, Taramani, Chennai 600 113, India.
authors.forename: G I
authors.initials: GI
authors.lastname: Menon
authors.forename: P
authors.initials: P
authors.lastname: Ray
authors.forename: P
authors.initials: P
authors.lastname: Shukla