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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/31017

Title: Stochastic Resonance Crossovers in Complex Networks
Authors: Pinamonti, Giovanni
Marro Borau, Joaquín
Torres Agudo, Joaquín J.
Issue Date: 2012
Abstract: Here we numerically study the emergence of stochastic resonance as a mild phenomenon and how this transforms into an amazing enhancement of the signal-to-noise ratio at several levels of a disturbing ambient noise. The setting is a cooperative, interacting complex system modelled as an Ising-Hopfield network in which the intensity of mutual interactions or “synapses” varies with time in such a way that it accounts for, e.g., a kind of fatigue reported to occur in the cortex. This induces nonequilibrium phase transitions whose rising comes associated to various mechanisms producing two types of resonance. The model thus clarifies the details of the signal transmission and the causes of correlation among noise and signal. We also describe short-time persistent memory states, and conclude on the limited relevance of the network wiring topology. Our results, in qualitative agreement with the observation of excellent transmission of weak signals in the brain when competing with both intrinsic and external noise, are expected to be of wide validity and may have technological application. We also present here a first contact between the model behavior and psychotechnical data.
Sponsorship: The work was supported by the following: Andalusian Regional Government “Junta de Andalucía,” project number FQM–01505; Spanish Science and Innovation Ministry MICINN–FEDER, project number FIS2009–08451; and Spanish Science and Innovation Ministry MICINN-GREIB, project number GREIB.PT_2011_19.
Publisher: Public Library of Science (PLOS)
Keywords: Background noise (acoustics)
Phase transitions
Resonance frequency
Signal processing
Working memory
URI: http://hdl.handle.net/10481/31017
ISSN: 1932-6203
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Pinamonti, G.; Marro, J.; Torres, J.J. Stochastic Resonance Crossovers in Complex Networks. Plos One 7(12): e51170 (2012). [http://hdl.handle.net/10481/31017]
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