Sielewiesiuk J, Górecki J. Complex transformations of chemical signals passing through a passive barrier.
Phys Rev E Stat Nonlin Soft Matter Phys 2002;
66:016212. [PMID:
12241466 DOI:
10.1103/physreve.66.016212]
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Abstract
It has been recently observed that a passive barrier separating two excitable chemical media may transform the frequency of a train of incoming pulses. In this work we apply the FitzHugh-Nagumo-type model to study this phenomenon in a detailed way. Our numerical calculations demonstrate that at the barrier a periodic train of pulses may be transformed into a complex output signal. The ratio of frequencies of the output and the input signals, plotted as a function of the barrier's width or as a function of the input signal frequency, has a devil's-staircase-like shape.
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