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Phys. Rev. E 72, 016109 (2005) [9 pages]

Path-integral approach to dynamics in a sparse random network

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Takashi Ichinomiya*
Laboratory of Nonlinear Studies and Computation, Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido, Japan

Received 29 January 2005; published 12 July 2005

We study the dynamics involved in a sparse random network model. We extend the standard mean-field approximation for the dynamics of a random network by employing the path-integral approach. The result indicates that the distribution of the variable is essentially identical to that obtained from globally coupled oscillators with random Gaussian interaction. We present the results of a numerical simulation of the Kuramoto transition in a random network, which is found to be consistent with this analysis.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevE.72.016109
DOI:
10.1103/PhysRevE.72.016109
PACS:
89.75.Hc, 89.75.Fb, 05.45.Xt

*Electronic address: miya@aurora.es.hokudai.ac.jp