Self-consistent expansion for the Kardar-Parisi-Zhang equation with correlated noise

A minor modification of the self-consistent expansion (SCE) for the Kardar-Parisi-Zhang (KPZ) system with uncorrelated noise is used to obtain the exponents in systems where the noise has spatial long-range correlations. For d-dimensional systems with correlations of the form [Formula Presented] [Formula Presented] we find a lower critical dimension [Formula Presented] above which a perturbative Edwards-Wilkinson (EW) solution appears. Below the lower critical dimension two solutions exist, each in a different, distinct region of ρ. For small ρ’s the solution of KPZ with uncorrelated noise is recovered. For large ρ’s a ρ-dependent solution is found. The existence of only one solution in each region of ρ is not a result of a competition between two solutions but a direct outcome of the SCE equation.