title: Global persistence exponent in critical dynamics: finite-size-induced crossover.
abstract: We extend the definition of a global order parameter to the case of a critical system confined between two infinite parallel plates separated by a distance L. For a quench to the critical point we study the persistence property of the global order parameter and show that there is a crossover behavior characterized by a nonuniversal exponent which depends on the ratio of the system size to a dynamic length scale.
authors.affiliation: Department of Theoretical Physics, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India. tpdc2@mahendra.iacs.res.in
authors.forename: D
authors.initials: D
authors.lastname: Chakraborty
authors.forename: J K
authors.initials: JK
authors.lastname: Bhattacharjee