Regensburg 2019 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 50: Poster: Nonlinear Systems, Patterns, Flows ..
DY 50.3: Poster
Donnerstag, 4. April 2019, 15:00–18:00, Poster B2
Synchronization in optical neurons — •Felix Köster1, Benjamin Lingnau1,2, Philipp Hövel1,3, and Kathy Lüdge1 — 1Institute of theoretical Physics, Technische Universität Berlin — 2Physics Department, University College Cork, College Rd, Irland — 3School of Mathematical Science, University College Cork, Irland
Recent studies have shown that information processing in neurons could be positively influenced by noise via noise-induced spiking. Inspired by this and the similar behavior of neurons and lasers, a network of quantum dot (QD) lasers is simulated in the steady state (continuous intensity output) close to a saddle-node infinite period (SNIPER) bifurcation. In this setup the QD lasers can be excited through noise into emitting pulses, i.e. spikes. Then the QD laser network can exhibit the counterintuitive effect of coherence resonance on the global network scale. We find that the regularity of noise-induced spiking has a maximum in its correlation at a finite value of the noise strength. We show that this collective coherence resonance effect is connected to the stability of the synchronized manifold and the global SNIPER bifurcations of the network. Additionally a scheme is introduced for identifying the network and parameter configurations where this collective coherence resonance effect can be detected.