title: Chaotic saddles at the onset of intermittent spatiotemporal chaos.
abstract: In a recent study [Rempel and Chian, Phys. Rev. Lett. 98, 014101 (2007)], it has been shown that nonattracting chaotic sets (chaotic saddles) are responsible for intermittency in the regularized long-wave equation that undergoes a transition to spatiotemporal chaos (STC) via quasiperiodicity and temporal chaos. In the present paper, it is demonstrated that a similar mechanism is present in the damped Kuramoto-Sivashinsky equation. Prior to the onset of STC, a spatiotemporally chaotic saddle coexists with a spatially regular attractor. After the transition to STC, the chaotic saddle merges with the attractor, generating intermittent bursts of STC that dominate the post-transition dynamics.
authors.affiliation: Institute of Aeronautical Technology (ITA) and World Institute for Space Environment Research (WISER), CTA/ITA/IEFM, São José dos Campos, São Paulo 12228-900, Brazil. rempel@ita.br
authors.forename: Erico L
authors.initials: EL
authors.lastname: Rempel
authors.forename: Abraham C-L
authors.initials: AC
authors.lastname: Chian
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Miranda