Noise-induced phase separation: Mean-field results

We present a study of a phase-separation process induced by the presence of spatially correlated multiplicative noise. We develop a mean-field approac h suitable for conserved-order-parameter systems and use it to obtain the p hase diagram of the model. Mean-field results are compared with numerical s imulations of the complete model in two dimensions. Additionally, a compari son between the noise-driven dynamics of conserved and nonconserved systems is made at the level of the mean-field: approximation. [S1063-651X(99)0141 0-5].