ABSTRACT
Some complex measures based on recurrence plots give evidence about hyperchaos-chaos transitions in coupled nonlinear systems [E. G. Souza et al., “Using recurrences to characterize the hyperchaos-chaos transition,” Phys. Rev. E 78, 066206 (2008)]. In this paper, these measures are combined with a significance test based on twin surrogates to identify such a transition in a fourth-order Lorenz-like system, which is able to pass from a hyperchaotic to a chaotic behavior for increasing values of a single parameter. A circuit analog of the mathematical model has been designed and implemented and the robustness of the recurrence-based method on experimental data has been tested. In both the numerical and experimental cases, the combination of the recurrence measures and the significance test allows to clearly identify the hyperchaos-chaos transition.
ACKNOWLEDGMENTS
This work was supported by DAAD/Ateneo Italo-Tedesco under the VIGONI Project. E.J.N. and J.K. also acknowledge the support of SFB 555; project C1 (DFG).
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