Resonance Induced by Repulsive Links

Vaz Martins, Teresa; Toral, Raúl
Applications of Nonlinear Dynamics - Model and Design of Complex Systems (In, Visarath; Longhini, Patrick; Palacios, Antonio, eds), XII, Springer Verlag, 439-444 (2009)

We study an Ising model in a network with disorder induced by the presence of both attractive and repulsive links. The system is subjected to a sub-threshold periodic signal, and the goal is to see how the response is enhanced for a given fraction of repulsive links.
By means of numerical simulations, we find that there is an optimal probability of repulsive links, such that the coherent response is maximal, and we propose a mechanism to explain this resonance.


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