Collective oscillations of lattices of locally coupled chaotic Rossler
oscillators are studied with regard to the dynamical scaling of their
phase interfaces. Using analogies with the complex Ginzburg-Landau an
d the Kardar-Parisi-Zhang equations, we argue that phase coherence sho
uld be lost in the infinite-size limit. Our numerical results, however
, indicate possible discrepancies with a Langevin-like description usi
ng an effective white-noise term. (C) 1998 Elsevier Science B.V. All r
ights reserved.