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Title:	Nature of the epidemic threshold for the susceptible-infected-susceptible dynamics in networks
Author:	Boguñá, Marian; Castellano, Claudio; Pastor Satorras, Romualdo
Other authors:	Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear; Universitat Politècnica de Catalunya. SIMCON - Grup de Recerca de Simulació per Ordinador en Matèria Condensada
Abstract:	We develop an analytical approach to the susceptible-infected-susceptible epidemic model that allows us to unravel the true origin of the absence of an epidemic threshold in heterogeneous networks. We find that a delicate balance between the number of high degree nodes in the network and the topological distance between them dictates the existence or absence of such a threshold. In particular, small-world random networks with a degree distribution decaying slower than an exponential have a vanishing epidemic threshold in the thermodynamic limit.
Subject(s):	-Àrees temàtiques de la UPC::Física -Thermodynamics -Statistical physics -susceptible-infected-susceptible epidemic model -Epidemic Threshold -Termodinàmica -Física estadística
Rights:	Attribution-NonCommercial-NoDerivs 3.0 Spain http://creativecommons.org/licenses/by-nc-nd/3.0/es/
Document type:	Article - Published version Article
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