MEMORY EFFECTS IN DIFFUSION-CONTROLLED REACTIONS

We consider the A + B --> 0 diffusion-controlled reaction under a stea dy source of particle pairs, all generated with the same interparticle distance. The pair creation stops after the time T. We monitor the re laxation of the system and we present for 1d numerical and analytical results. The decay form after the stop is strongly dependent on T and thus the reaction-diffusion system keeps memory of the generation time . We discuss also the situation in higher dimensions.