Laminar chaos in experiments and nonlinear delayed Langevin equations: A time series analysis toolbox for the detection of laminar chaos

Abstract

Recently, it was shown that certain systems with large time-varying delay exhibit different types of chaos, which are related to two types of time-varying delay: conservative and dissipative delays. The known high-dimensional Turbulent Chaos is characterized by strong fluctuations. In contrast, the recently discovered low-dimensional Laminar Chaos is characterized by nearly constant laminar phases with periodic durations and a chaotic variation of the intensity from phase to phase. In this paper we extend our results from our preceding publication [J. D. Hart, R. Roy, D. Müller-Bender, A. Otto, and G. Radons, PRL 123 154101 (2019)], where it is demonstrated that Laminar Chaos is a robust phenomenon, which can be observed in experimental systems. We provide a time series analysis toolbox for the detection of robust features of Laminar Chaos. We benchmark our toolbox by experimental time series and time series of a model system which is described by a nonlinear Langevin equation with time-varying delay. The benchmark is done for different noise strengths for both the experimental system and the model system, where Laminar Chaos can be detected, even if it is hard to distinguish from Turbulent Chaos by a visual analysis of the trajectory.

Attractor-driven matter

“…Features of laminar chaos are robust, being preserved even when noise is added to the system. 68,111 Using systems that exhibit laminar chaos, to model our internal state-space, will allow us to construct attractordriven particles that preserve correlations even when disturbed by external noise. • In normal chaos, small changes in initial conditions lead to very different trajectories but the statistics normally remain the same.…”

Ламинарный Хаос В Связанных Системах С Запаздыванием

“…До сих пор явление ламинарного хаоса наблюдалось только в одиночных автоколебательных системах с запаздыванием при определенных условиях изменения времени задержки [13][14][15][16][17]. В настоящей работе мы впервые показали, что ламинарный хаос может существовать не только в системе с переменным временем задержки, но и в системе с постоянным временем задержки, если она связана с системой, находящейся в режиме ламинарного хаоса.…”

Chaotic Diffusion in Delay Systems: Giant Enhancement by Time Lag Modulation

“…While most investigations considered constant delay [48][49][50][51][52][53][54][55], recently some progress was made also for such systems with periodic delay A = 0 theoretically [56,57] and experimentally [58][59][60][61]. Eq.…”