2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/22848Motivated by the phenomenologies of dynamic roughening of strings in random media and magnetohydrodynamics, we examine the universal properties of driven diffusive system with coupled fields. We demonstrate that cross-correlations between the fields lead to amplitude-ratios and scaling exponents varying continuosly with the strength of these cross-correlations. The implications of these results for experimentally relevant systems are discussed.To appear in Phys. Rev. E (Rapid Comm.) (2003)Statistical Mechanicstext