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03 December 2021
 
  » arxiv » 2008.02319

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Critical Phenomena in Complex Networks: from Scale-free to Random Networks
Alexander I. Nesterov ; Pablo Héctor Mata Villafuerte ;
Date 5 Aug 2020
AbstractWithin the conventional statistical physics framework, we study critical phenomena in a class of network models with hidden variables controlling links between pairs of nodes. We find analytical expressions for the average node degree, the expected number of edges, and the Landau and Helmholtz free energies as a function of the temperature and number of nodes. We show that the network’s temperature is a parameter that controls the transition from unconnected graphs to power-degree (scale-free) and random graphs. With increasing temperature, the degree distribution is changed from power-degree, for lower temperatures, to a Poisson-like distribution for high temperatures. We also show that phase transition in the sparse networks leads to the fundamental structural changes in the network topology. Below the critical temperature, the graph is completely disconnected. Above the critical temperature, the graph becomes connected, and a giant component appears.
Source arXiv, 2008.02319
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