https://doi.org/10.1140/epjb/e2012-30310-1
Regular Article
Signal amplification of active rotators with phase-shifted coupling
1 Institute of Mathematics and Computer Science, University of São Paulo, 13560-970 São Carlos, Brazil
2 Institute of Theoretical Physics and Department of Physics, East China Normal University, Shanghai 200062, P.R. China
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e-mail: xm-liang@hotmail.com
Received: 11 April 2012
Received in final form: 27 April 2012
Published online: 25 June 2012
In this paper, we study the signal amplification of coupled active rotators with phase-shifted coupling. We find that the system’s response to the external subthreshold signal can be significantly affected by each of the two types of phase-shifted couplings: identical and non-identical phase-shifted couplings. Moreover, through both theoretical analysis and numerical simulations, we have figured out the optimal phase shift, at which the largest signal amplification is generated. These results show that the phase-shifted coupling plays an important role in regulating the system’s response to the subthreshold signal.
Key words: Statistical and Nonlinear Physics
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2012
