The extreme vulnerability of interdependent spatially embedded networks

Amir Bashan, Yehiel Berezin, Sergey V. Buldyrev, Shlomo Havlin

Research output: Contribution to journalArticlepeer-review

257 Scopus citations

Abstract

Recent studies show that in interdependent networks a very small failure in one network may lead to catastrophic consequences. Above a critical fraction of interdependent nodes, even a single node failure can invoke cascading failures that may abruptly fragment the system, whereas below this critical dependency a failure of a few nodes leads only to a small amount of damage to the system. So far, research has focused on interdependent random networks without space limitations. However, many real systems, such as power grids and the Internet, are not random but are spatially embedded. Here we analytically and numerically study the stability of interdependent spatially embedded networks modelled as lattice networks. Surprisingly, we find that in lattice systems, in contrast to non-embedded systems, there is no critical dependency and any small fraction of interdependent nodes leads to an abrupt collapse. We show that this extreme vulnerability of very weakly coupled lattices is a consequence of the critical exponent describing the percolation transition of a single lattice.

Original languageEnglish
Pages (from-to)667-672
Number of pages6
JournalNature Physics
Volume9
Issue number10
DOIs
StatePublished - Oct 2013

Bibliographical note

Funding Information:
We acknowledge the European EPIWORK and MULTIPLEX (EU-FET project 317532) projects, the Deutsche Forschungsgemeinschaft (DFG), the Israel Science Foundation, ONR and DTRA for financial support.

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