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DY: Fachverband Dynamik und Statistische Physik
DY 18: Nonlinear Dynamics, Synchronization and Chaos
DY 18.3: Talk
Tuesday, March 28, 2023, 10:30–10:45, ZEU 148
Pseudo-laminar chaos from on-off intermittency — •David Müller-Bender1, Rahil N. Valani2, and Günter Radons1,3 — 1Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany — 2School of Mathematical Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia — 3ICM - Institute for Mechanical and Industrial Engineering, 09117 Chemnitz, Germany
In finite-dimensional, chaotic, Lorenz-like wave-particle dynamical systems one can find diffusive trajectories, which share their appearance with that of laminar chaotic diffusion [Phys. Rev. Lett. 128, 074101 (2022)] known from delay systems with lag-time modulation. Applying, however, to such systems a test for laminar chaos, as proposed in [Phys. Rev. E 101, 032213 (2020)], these signals fail such test, thus leading to the notion of pseudo-laminar chaos. The latter can be interpreted as integrated periodically driven on-off intermittency. We demonstrate that, on a signal level, true laminar and pseudo-laminar chaos are hardly distinguishable in systems with and without dynamical noise. However, very pronounced differences become apparent when correlations of signals and increments are considered. We compare and contrast these properties of pseudo-laminar chaos with true laminar chaos.
Details can be found in the preprint [arXiv:2211.01278 (2022)].