Volume 102, Number 3, May 2013
|Number of page(s)||5|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||23 May 2013|
Mobility-enhanced signal response in metapopulation networks of coupled oscillators
1 Hefei National Laboratory for Physical Sciences at Microscales & Department of Chemical Physics, University of Science and Technology of China - Hefei, 230026, China
2 Department of Physics, Anqing Normal University - Anqing, 246011, China
3 School of Physics and Material Science, Anhui University - Hefei, 230039, China
Received: 27 March 2013
Accepted: 1 May 2013
We investigate the effect of mobility on the response of coupled oscillators to a subthreshold external signal in metapopulation networks, wherein each node represents a subpopulation with overdamped bistable oscillators that can randomly diffuse between nodes. With increasing mobility rate, the oscillators undergo transitions from intrawell to interwell motion, demonstrating clearly mobility-enhanced signal amplification. Moreover, the response shows nonmonotonic dependence on the mobility rate, i.e., a maximal gain occurs at a moderate level of mobility. This interesting phenomenon is robust against variations in the overall density, network size, as well as network topology. In addition, a simple mean-field analysis is carried out to qualitatively illustrate the simulation results.
PACS: 89.75.Hc – Networks and genealogical trees / 05.45.Xt – Synchronization; coupled oscillators / 89.75.Fb – Structures and organization in complex systems
© EPLA, 2013
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