Now showing items 1-10 of 10

  • Competing activation mechanisms in epidemics on networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (2012-04-20)
    Article
    Restricted access - publisher's policy
    In contrast to previous common wisdom that epidemic activity in heterogeneous networks is dominated by the hubs with the largest number of connections, recent research has pointed out the role that the innermost, dense ...
  • Epidemic thresholds of the susceptible-infected-susceptible model on networks: a comparison of numerical and theoretical results 

    Ferreira, Silvio C.; Castellano, Claudio; Pastor Satorras, Romualdo (2012-10-15)
    Article
    Open Access
    Recent work has shown that different theoretical approaches to the dynamics of the susceptible-infected-susceptible (SIS) model for epidemics lead to qualitatively different estimates for the position of the epidemic ...
  • Irrelevance of information outflow in opinion dynamics models 

    Castellano, Claudio; Pastor Satorras, Romualdo (2011-01-27)
    Article
    Open Access
    The Sznajd model for opinion dynamics has attracted a large interest as a simple realization of the psychological principle of social validation. As its most salient feature, it has been claimed that the Sznajd model is ...
  • Lifespan method as a tool to study criticality in absorbing-state phase transitions 

    de Souza Mata, Angelica; Boguñá, Marian; Castellano, Claudio; Pastor Satorras, Romualdo (2015-05-12)
    Article
    Open Access
    In a recent work, a new numerical method (the lifespan method) has been introduced to study the critical properties of epidemic processes on complex networks [M. Boguna, C. Castellano, and R. Pastor-Satorras, Phys. Rev. ...
  • Nature of the epidemic threshold for the susceptible-infected-susceptible dynamics in networks 

    Boguñá, Marian; Castellano, Claudio; Pastor Satorras, Romualdo (2013-08-07)
    Article
    Open Access
    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 ...
  • Non-mean-field behavior of the contact process on scale-free networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (2006)
    Article
    Open Access
    We present an analysis of the classical contact process on scale-free networks. A mean-field study, both for finite and infinite network sizes, yields an absorbing-state phase transition at a finite critical value of the ...
  • Quasistationary simulations of the contact process on quenched networks 

    Ferreira, Silvio C.; Ferreira, Ronan S.; Castellano, Claudio; Pastor Satorras, Romualdo (2011)
    Article
    Open Access
    We present high-accuracy quasistationary (QS) simulations of the contact process in quenched networks, built using the configuration model with both structural and natural cutoffs. The critical behavior is analyzed in the ...
  • Thresholds for epidemic spreading in networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (2010)
    Article
    Open Access
    We study the threshold of epidemic models in quenched networks with degree distribution given by a power-law. For the susceptible-infected-susceptible model the activity threshold c vanishes in the large size limit on any ...
  • Universal and nonuniversal features of the generalized voter class for ordering dynamics in two dimensions 

    Castellano, Claudio; Pastor Satorras, Romualdo (2012-11-21)
    Article
    Open Access
    By considering three different spin models belonging to the generalized voter class for ordering dynamics in two dimensions [ Dornic et al. Phys. Rev. Lett. 87 045701 (2001)], we show that they behave differently from the ...
  • Zero temperature Glauber dynamics on complex networks 

    Castellano, Claudio; Pastor Satorras, Romualdo (IOP PUBLISHING LTD., 2006-05-03)
    Article
    Restricted access - publisher's policy
    We study the Glauber dynamics at zero temperature of spins placed on the vertices of an uncorrelated network with a power law degree distribution. Application of mean-field theory yields as the main prediction that for ...