RELAXATIONAL DYNAMICS AFTER THE QUENCH OF A CONSERVED SYSTEM WITH A CONTINUOUS SYMMETRY

We study the dynamics of a two-dimensional system with complex conserved order parameter, following a deep quench. In accordance with a recent theoretical prediction, we observe an effective value of the dynamical exponent at late times of phi = 0.245 +/- 0.010. While interesting dynamical effects were noticed in the study of the equal-time correlation functions, no evidence of multiscaling behavior was found. A correspondence between the quenched dynamics of this system in two dimensions and the dynamics of roughening of crystal-vapor interfaces is pointed out. We also study the dynamics in one dimension and find that phi almost-equal-to 0.18.