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Consistency properties of chaotic systems driven by time-delayed feedback

AuthorsJüngling, Thomas; Soriano, Miguel C. ; Oliver, Neus ; Porte, Xavier ; Fischer, Ingo
Issue DateApr-2018
PublisherAmerican Physical Society
CitationPhysical Review E 97(4): 042202 (2018)
AbstractConsistency refers to the property of an externally driven dynamical system to respond in similar ways to similar inputs. In a delay system, the delayed feedback can be considered as an external drive to the undelayed subsystem. We analyze the degree of consistency in a generic chaotic system with delayed feedback by means of the auxiliary system approach. In this scheme an identical copy of the nonlinear node is driven by exactly the same signal as the original, allowing us to verify complete consistency via complete synchronization. In the past, the phenomenon of synchronization in delay-coupled chaotic systems has been widely studied using correlation functions. Here, we analytically derive relationships between characteristic signatures of the correlation functions in such systems and unequivocally relate them to the degree of consistency. The analytical framework is illustrated and supported by numerical calculations of the logistic map with delayed feedback for different replica configurations. We further apply the formalism to time series from an experiment based on a semiconductor laser with a double fiber-optical feedback loop. The experiment constitutes a high-quality replica scheme for studying consistency of the delay-driven laser and confirms the general theoretical results.
Publisher version (URL)https://doi.org/10.1103/PhysRevE.97.042202
Appears in Collections:(IFISC) Artículos
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