Wave localization in complex networks with high clustering

Lukas Jahnke, Jan W. Kantelhardt, Richard Berkovits, Shlomo Havlin

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39 Scopus citations

Abstract

We show that strong clustering of links in complex networks, i.e., a high probability of triadic closure, can induce a localization-delocalization quantum phase transition (Anderson-like transition) of coherent excitations. For example, the propagation of light wave packets between two distant nodes of an optical network (composed of fibers and beam splitters) will be absent if the fraction of closed triangles exceeds a certain threshold. We suggest that such an experiment is feasible with current optics technology. We determine the corresponding phase diagram as a function of clustering coefficient and disorder for scale-free networks of different degree distributions P(k)∼k-λ. Without disorder, we observe no phase transition for λ<4, a quantum transition for λ>4, and an additional distinct classical transition for λ>4.5. Disorder reduces the critical clustering coefficient such that phase transitions occur for smaller λ.

Original languageEnglish
Article number175702
JournalPhysical Review Letters
Volume101
Issue number17
DOIs
StatePublished - 23 Oct 2008

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