INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
Noise-sustained synchronization between electrically coupled FitzHugh?Nagumo networks
GUADALUPE CASCALLARES; MATÍAS DELL'ERBA; A. SÁNCHEZ; G.G. IZÚS
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
ELSEVIER SCIENCE BV
Lugar: Amsterdam; Año: 2015 vol. 433 p. 356 - 356
We investigate the capability of electrical synapses to transmit the noise-sustained networkactivity from one network to another. The particular setup we consider is two identicalrings with excitable FitzHugh?Nagumo cell dynamics and nearest-neighbor antiphaseintra-ring coupling, electrically coupled between corresponding nodes. The whole systemis submitted to independent local additive Gaussian white noises with common intensityη, but only one ring is externally forced by a global adiabatic subthreshold harmonic signal.We then seek conditions for a particular noise level to promote synchronized stablefiring patterns. By running numerical integrations with increasing η, we observe the excitationactivity to become spatiotemporally self-organized, until η is so strong that spoilssync between networks for a given value of the electric coupling strength. By means of afour-cell model and calculating the stationary probability distribution, we obtain a (signaldependent)non-equilibrium potential landscape which explains qualitatively the observedregimes, and whose barrier heights give a good estimate of the optimal noise intensity forthe sync between networks.