title: Synchronization by dynamical relaying in electronic circuit arrays.
abstract: We experimentally study the synchronization of two chaotic electronic circuits whose dynamics is relayed by a third parameter-matched circuit, to which they are coupled bidirectionally in a linear chain configuration. In a wide range of operating parameters, this setup leads to synchronization between the outer circuits, while the relaying element remains unsynchronized. The specifics of the synchronization differ with the coupling level: for low couplings a state of intermittent synchronization between the outer circuits coexists with one of antiphase synchronization. Synchronization becomes in phase for moderate couplings, and for strong coupling identical synchronization is observed between the outer elements, which are themselves synchronized in a generalized way with the relaying element. In the latter situation, the middle element displays a triple-scroll attractor that is not possible to obtain when the chaotic oscillator is isolated.
authors.affiliation: Departament de Física, Universitat de les Illes Balears, E-07122 Palma de Mallorca, Spain.
authors.forename: Iacyel Gomes
authors.initials: IG
authors.lastname: Da Silva
authors.forename: Javier M
authors.initials: JM
authors.lastname: Buldú
authors.forename: Claudio R
authors.initials: CR
authors.lastname: Mirasso
authors.forename: Jordi
authors.initials: J
authors.lastname: García-Ojalvo