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Signal amplification of active rotators with phase-shifted coupling

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Abstract

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.

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Authors and Affiliations

  1. Institute of Mathematics and Computer Science, University of São Paulo, 13560-970, São Carlos, Brazil

    X. M. Liang & L. Zhao

  2. Institute of Theoretical Physics and Department of Physics, East China Normal University, Shanghai, 200062, P.R. China

    Z. H. Liu

Authors
  1. X. M. Liang
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  2. L. Zhao
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  3. Z. H. Liu
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Correspondence to X. M. Liang.

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Liang, X.M., Zhao, L. & Liu, Z.H. Signal amplification of active rotators with phase-shifted coupling. Eur. Phys. J. B 85, 219 (2012). https://doi.org/10.1140/epjb/e2012-30310-1

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  • DOI: https://doi.org/10.1140/epjb/e2012-30310-1

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