paper

Global Persistence Exponent for Critical Dynamics

arXiv:cond-mat/9606123 · doi:10.1103/PhysRevLett.77.3704

Abstract

A `persistence exponent' is defined for nonequilibrium critical phenomena. It describes the probability, , that the global order parameter has not changed sign in the time interval following a quench to the critical point from a disordered state. This exponent is calculated in mean-field theory, in the limit of the model, to first order in , and for the 1-d Ising model. Numerical results are obtained for the 2-d Ising model. We argue that is a new independent exponent.

4 pages, revtex, one figure

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