Assortativity Decreases the Robustness of Interdependent Networks

Details Assortativity Decreases the Robustness of Interdependent Networks Assortativity Decreases the Robustness of Interdependent Networks

2012-02-29

arxiv.org/abs/1203.0029v1

Physics

Physics and Society

Scientific paper

The protection of critical infrastructures is one of the highest priorities in our technological society. It was recently recognized that interdependencies among different networks can play a crucial role in triggering cascading failures and hence system-wide disasters. A recent model shows how pairs of interdependent networks can exhibit an abrupt percolation transition as failures accumulate. We report on the effects of topology on failure propagation for a model system consisting of two interdependent networks. We find that the internal node correlations in each of the two interdependent networks significantly changes the critical density of failures that triggers the total disruption of the two-network system. We find, in particular, that the assortativity within a single network decreases the robustness of the entire system. The results of this study on the influence of assortativity may provide insights into ways of improving the robustness of network architecture, and thus enhance the level of protection of critical infrastructures.

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