Journal
FLUCTUATION AND NOISE LETTERS
Volume 2, Issue 3, Pages L139-L146Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0219477502000749
Keywords
stochastic point processes; coherence resonance; neuroscience
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Coherence resonance describes a phenomenon in excitable systems in which a suitable dose of noise generates excitation-events that maximizes its periodicity or coherence. The Fano-factor, defined as the ratio of the standard deviation of the time-intervals between successive events and the average time interval, exhibits a minimum at this optimal noise level. It is shown here that a decreasing Fano factor is a necessary but not a sufficient criterion to indicate enhanced coherence of a signal.
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