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Mean-field and Fluctuations for Hub Dynamics in Heterogeneous Random Networks
Zheng Bian1,2, Jeroen S W Lamb2,3,4, Tiago Pereira1,2
1Instituto de Ciências Matemáticas e de Computação, Universidade de São Paulo, 13566-590 São Carlos, Brazil.
None:
We study a class of heterogeneous random networks, where the network degree distribution follows a power-law, and each node dynamics is a random dynamical system, interacting with neighboring nodes via a random coupling function. We characterize the hub behavior by the mean-field, subject to statistically controlled fluctuations. In particular, we prove that the fluctuations are small over exponentially long time scales and obtain Berry-Esseen estimates for the fluctuation statistics at any fixed time. Our results provide an explanation for several numerical observations, namely, a scaling relation between system size and frequency of large fluctuations, the system size induced desynchronization, and the Gaussian behavior of the fluctuations.
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