Regensburg 2019 – wissenschaftliches Programm

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SYSD: Symposium SKM Dissertation-Prize 2019

SYSD 1: SKM Dissertation Prize

SYSD 1.1: Hauptvortrag

Montag, 1. April 2019, 09:30–09:50, H2

Synchronization and Waves in Confined Complex Active Media — •Jan Frederik Totz — Technische Universität Berlin, Berlin, Germany

Self-organization phenomena that lead to pattern formation and synchronization play an important role in biology, chemistry, physics and technological applications. They manifest for example in electrical waves on the heart muscle, fireflies flashing in unison, power-grid blackouts and neurological functions as well as disorders.

I will present a versatile experimental setup based on optically coupled catalytic micro-particles, that allows studying synchronization patterns in very large networks of relaxation oscillators under well-controlled laboratory conditions. In particular I will show our experimental verification of the elusive spiral wave chimera state, whose existence was predicted more than 15 years ago. This pattern features a wave rotating around a spatially extended core that consists of phase-randomized oscillators. The spiral wave chimera is likely to play a role in cortical cell ensembles, arrays of SQUIDS and carpets of cilia.

Furthermore, these experimental capabilities facilitate the free choice of network topology, coupling function as well as its strength, range and time delay, which can even be chosen as time-dependent. This opens the door to a broad range of future experimental inquiries into pattern formation and synchronization on large networks, which were previously out of reach.