Localized structures in coupled Ginzburg-Landau equations

Coupled complex Ginzburg-Landau equations describe generic features of the dynamics of coupled fields when they are close to a Hopf bifurcation leadin g to nonlinear oscillations. We study numerically this set of equations and find, within a particular range of parameters, the presence of uniformly p ropagating localized objects behaving as coherent structures. Some of these localized objects are interpreted in terms of an analytical ansatz. (C) 20 00 Published by Elsevier Science B.V.