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

We study the dynamics of a two-dimensional system with complex conserv ed order parameter, following a deep quench. In accordance with a rece nt theoretical prediction, we observe an effective value of the dynami cal exponent at late times of phi = 0.245 +/- 0.010. While interesting dynamical effects were noticed in the study of the equal-time correla tion functions, no evidence of multiscaling behavior was found. A corr espondence between the quenched dynamics of this system in two dimensi ons and the dynamics of roughening of crystal-vapor interfaces is poin ted out. We also study the dynamics in one dimension and find that phi almost-equal-to 0.18.