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Period-doubling bifurcation in an array of coupled stochastically excitable elements subjected to global periodic
Xiaohua Cui1, Robert J Rovetti, Ling Yang
1Department of Physiological Science, University of California, Los Angeles, California 90095, USA.
Abstract:
The collective behaviors of coupled, stochastically excitable elements subjected to global periodic forcing are investigated numerically and analytically. We show that the whole system undergoes a period-doubling bifurcation as the driving period decreases, while the individual elements still exhibit random excitations. Using a mean-field representation, we show that this macroscopic bifurcation behavior is caused by interactions between the random excitation, the refractory period, and recruitment (spatial cooperativity) of the excitable elements.
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