Modulating coherence resonance in non-excitable systems by time-delayed feedback

The European Physical Journal B - Tập 87 - Trang 1-13 - 2014
Paul M. Geffert1, Anna Zakharova1, Andrea Vüllings1, Wolfram Just1,2, Eckehard Schöll1
1Institut für Theoretische Physik, Technische Universität Berlin, Berlin, Germany
2Queen Mary University of London, School of Mathematical Sciences, London, UK

Tóm tắt

We propose a paradigmatic model system, a subcritical Hopf normal form subjected to noise and time-delayed feedback, to investigate the impact of time delay on coherence resonance in non-excitable systems. We develop analytical tools to estimate the stationary distribution and the time correlations in nonlinear stochastic delay differential equations. These tools are applied to our model to propose a novel quantity to measure coherence resonance induced by a saddle-node bifurcation of periodic orbits.

Tài liệu tham khảo

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