15 de abril de 2002

Stochastic resonance in a model of opinion formation on small-world networks

M. Kuperman, D. Zanette, Eur. Phys. J. B 26, 387 (2002)

We analyze the phenomenon of stochastic resonance in an Ising-like system on a small-world network. The system, which is subject to the combined action of noise and an external modulation, can be interpreted as a stylized model of opinion formation by imitation under the effects of a “fashion wave”. Both the amplitude threshold for the detection of the external modulation and the width of the stochastic- resonance peak show considerable variation as the randomness of the underlying small-world network is changed.