Complex networks with tuneable spectral dimension as a universality playground

Ana P. Millán, Giacomo Gori, Federico Battiston, Tilman Enss, Nicolò Defenu*

*Corresponding author for this work

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Universality is one of the key concepts in understanding critical phenomena. However, for interacting inhomogeneous systems described by complex networks, a clear understanding of the relevant parameters for universality is still missing. Here we discuss the role of a fundamental network parameter for universality, the spectral dimension. For this purpose, we construct a complex network model where the probability of a bond between two nodes is proportional to a power law of the nodes' distances. By explicit computation we prove that the spectral dimension for this model can be tuned continuously from 1 to infinity, and we discuss related network connectivity measures. We propose our model as a tool to probe universal behavior on inhomogeneous structures and comment on the possibility that the universal behavior of correlated models on such networks mimics the one of continuous field theories in fractional Euclidean dimensions.
Original languageEnglish
Article number023015
JournalPhysical Review Research
Issue number2
Publication statusPublished - 5 Apr 2021

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