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 1D Ising model. Numerical results are obtained for the 2D Ising model. We argue that is a new independent exponent.
- Received 17 June 1996
DOI:https://doi.org/10.1103/PhysRevLett.77.3704
©1996 American Physical Society