Delay-Induced Excitability

Piwonski, Tomasz and Houlihan, John (2005) Delay-Induced Excitability. Physical Review Letters, 95 (4). 040601. ISSN 00319007

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We analyze the stochastic dynamics of a bistable system under the influence of time-delayed feedback. Assuming an asymmetric potential, we show the existence of a regime in which the system dynamics displays excitability by calculating the relevant residence time distributions and power spectra. Experimentally we then observe this behavior in the polarization dynamics of a vertical cavity surface emitting laser with optoelectronic feedback. Extending these observations to two-dimensional systems with diffusive coupling, we finally show numerically that delay-induced excitability can lead to the appearance of propagating wave fronts and spirals.

Item Type: Article
Departments or Groups: Optics Research Group
Depositing User: John Houlihan
Date Deposited: 19 Nov 2012 16:08
Last Modified: 22 Aug 2016 10:25

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