It is shown that the dynamics of linear perturbations of the turbulent regimes in coupled-map lattices is governed by a discrete version of the Kardar-Parisi-Zhang equation [Phys. Rev. Lett. 56, 889 (1986)]. The asymptotic scaling behavior of the perturbation field is investigated in the case of large lattices. A possible application to spatiotemporal intermittency is discussed.
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Pikovsky et al. (1994) studied this question.