title: Zero-lag long-range synchronization via dynamical relaying.
abstract: We show that isochronous synchronization between two delay-coupled oscillators can be achieved by relaying the dynamics via a third mediating element, which surprisingly lags behind the synchronized outer elements. The zero-lag synchronization thus obtained is robust over a considerable parameter range. We substantiate our claims with experimental and numerical evidence of such synchronization solutions in a chain of three coupled semiconductor lasers with long interelement coupling delays. The generality of the mechanism is validated in a neuronal model with the same coupling architecture. Thus, our results show that zero-lag synchronized chaotic dynamical states can occur over long distances through relaying, without restriction by the amount of delay.
authors.affiliation: Department of Applied Physics and Photonics, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium.
authors.forename: Ingo
authors.initials: I
authors.lastname: Fischer
authors.forename: Raúl
authors.initials: R
authors.lastname: Vicente
authors.forename: Javier M
authors.initials: JM
authors.lastname: Buldú
authors.forename: Michael
authors.initials: M
authors.lastname: Peil
authors.forename: Claudio R
authors.initials: CR
authors.lastname: Mirasso
authors.forename: M C
authors.initials: MC
authors.lastname: Torrent
authors.forename: Jordi
authors.initials: J
authors.lastname: García-Ojalvo