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Synchronizability of two-layer networks

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Abstract

In this paper, we investigate the synchronizability of two-layer networks according to the master stability method. We define three particular couplings: positively correlated, randomly correlated and negatively correlated couplings. When the inter-layer coupling strength is fixed, negatively correlated coupling leads to the best synchronizability of a two-layer network, and synchronizability of networks with randomly and positively correlated couplings follow consecutively. For varying inter-layer coupling strength, the trend of network synchronizability with an unbounded synchronous region differs from that with a bounded one. If the synchronous region is unbounded, synchronizability of the two-layer network keeps enhancing, but it has a threshold. If the synchronous region is bounded, the synchronizability of the two-layer network keeps improving until the inter-layer coupling strength reaches a certain value, and then the synchronizability gets weakened with ever-increasing inter-layer coupling strength. To summarise, there exists an optimal value of the inter-layer coupling strength for maximising synchronizability of two-layer networks, regardless of the synchronous region types and coupling patterns. The findings provided in this paper shed new light on understanding synchronizability of multilayer networks, and may find potential applications in designing optimal inter-layer couplings for synchronization of two-layer networks.

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Authors and Affiliations

  1. School of Mathematics and Statistics, Wuhan University, Wuhan, 430072, P.R. China

    Mingming Xu, Jin Zhou, Jun-an Lu & Xiaoqun Wu

  2. Department of Electrical and Computer Engineering, University of California, Riverside, CA, 92521, USA

    Jin Zhou

Authors
  1. Mingming Xu
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  2. Jin Zhou
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  3. Jun-an Lu
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  4. Xiaoqun Wu
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Correspondence to Jin Zhou.

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Xu, M., Zhou, J., Lu, Ja. et al. Synchronizability of two-layer networks. Eur. Phys. J. B 88, 240 (2015). https://doi.org/10.1140/epjb/e2015-60330-0

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