title: Resonance induced by repulsive interactions in a model of globally coupled bistable systems.
abstract: We show the existence of a competition-induced resonance effect for a generic globally coupled bistable system. In particular, we demonstrate that the response of the macroscopic variable to an external signal is optimal for a particular proportion of repulsive links. Furthermore, we show that a resonance also occurs for other system parameters, like the coupling strength and the number of elements. We relate this resonance to the appearance of a multistable region, and we predict the location of the resonance peaks, by a simple spectral analysis of the Laplacian matrix.
authors.affiliation: IFISC, Instituto de Física Interdisciplinar y Sistemas Complejos, CSIC-UIB, Campus UIB, E-07122 Palma de Mallorca, Spain.
authors.forename: T
authors.initials: T
authors.lastname: Vaz Martins
authors.forename: V N
authors.initials: VN
authors.lastname: Livina
authors.forename: A P
authors.initials: AP
authors.lastname: Majtey
authors.forename: R
authors.initials: R
authors.lastname: Toral