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DY: Fachverband Dynamik und Statistische Physik
DY 10: Nonlinear Dynamics, Synchronization and Chaos
DY 10.11: Vortrag
Montag, 18. März 2024, 17:45–18:00, BH-N 128
Dynamics of transient chaos in excitable media — Melvin Dix1,2, Paula Luttermann1,2, Thomas Lilienkamp3, Stefan Luther1,2,4,5, and •Ulrich Parlitz1,2,5 — 1Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany — 2Institute for the Dynamics of Complex Systems, Georg-August-Universität Göttingen, Germany — 3Computational Physics for Life Science, Nuremberg Institute of Technology Georg Simon Ohm, Nuremberg, Germany — 4Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Göttingen, Germany — 5German Center for Cardiovascular Research (DZHK e.V., partner site Niedersachsen), Göttingen, Germany
Chaotic spatio-temporal dynamics in excitable media such as cardiac tissue is often not permanent but limited in time. In this contribution, we discuss the influence of heterogeneities and stochastic perturbations on the mean lifetime of such chaotic transients. Using simulations with the Aliev-Panfilov and the Fenton-Karma model, we show that both forms of perturbationss can (significantly) prolong the duration of chaotic transients.
Keywords: excitable media; transient chaos; cardiac arrhythmias; dynamical noise