Enhanced response of the regular networks to local signals in presence of a fast impurity

Abstract

We consider an array of inductively coupled Josephson junctions with a fast impurity (a junction with a smaller value of critical current), and study the consequences of imposing a small amplitude periodic signal at some point in the array. We find that when external signal is imposed at the impurity, the response of the array is boosted and a small amplitude signal can be detected throughout the array. When the signal is imposed elsewhere, minor effects is seen on the dynamics of the array. The same results have been also seen in presence of a single fast spiking neuron in a chain of diffusively coupled FitzHugh-Nagumo neurons.

arXiv comment6 pages, 5 figures, arXiv admin note: substantial text overlap with arXiv:1108.4605

References in corpus (5)

• Diversity-induced resonance
• Chromatin dynamics: Nucleosomes go mobile through twist defects
• Amplified signal response in scale-free networks by collaborative signaling
• Fluctuation - induced nucleation and dynamics of the kinks on dislocation. Soliton and oscillation regimes in 2D Frenkel-Kontorova model
• Kink nucleation in two-dimensional Frenkel-Kontorova model