Finite-size scaling of synchronized oscillation on complex networks

Details Finite-size scaling of synchronized oscillation on complex networks Finite-size scaling of synchronized oscillation on complex networks

2007-10-05

arxiv.org/abs/0710.1137v1

PRE 76, 066104 (2007)

Physics

Condensed Matter

Statistical Mechanics

7 pages

Scientific paper

10.1103/PhysRevE.76.066104

The onset of synchronization in a system of random frequency oscillators coupled through a random network is investigated. Using a mean-field approximation, we characterize sample-to-sample fluctuations for networks of finite size, and derive the corresponding scaling properties in the critical region. For scale-free networks with the degree distribution $P(k)\sim k^{-\gamma}$ at large $k$, we found that the finite size exponent $\bar{\nu}$ takes on the value 5/2 when $\gamma>5$, the same as in the globally coupled Kuramoto model. For highly heterogeneous networks ($3<\gamma <5$), $\bar{\nu}$ and the order parameter exponent $\beta$ depend on $\gamma$. The analytic expressions for these exponents obtained from the mean field theory are shown to be in excellent agreement with data from extensive numerical simulations.

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