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Citació: Starnini, M. [et al.]. Random walks on temporal networks. "Physical review E: statistical, nonlinear, and soft matter physics", 2012, vol. 85, núm. 5, p. 1-12.
Títol: Random walks on temporal networks
Autor: Starnini, Michele Veure Producció científica UPC; Baronchelli, Andrea Veure Producció científica UPC; Barrat, Alain; Pastor Satorras, Romualdo Veure Producció científica UPC
Data: 2012
Tipus de document: Article
Resum: Many natural and artificial networks evolve in time. Nodes and connections appear and disappear at various time scales, and their dynamics has profound consequences for any processes in which they are involved. The first empirical analysis of the temporal patterns characterizing dynamic networks are still recent, so that many questions remain open. Here, we study how random walks, as a paradigm of dynamical processes, unfold on temporally evolving networks. To this aim, we use empirical dynamical networks of contacts between individuals, and characterize the fundamental quantities that impact any general process taking place upon them. Furthermore, we introduce different randomizing strategies that allow us to single out the role of the different properties of the empirical networks. We show that the random walk exploration is slower on temporal networks than it is on the aggregate projected network, even when the time is properly rescaled. In particular, we point out that a fundamental role is played by the temporal correlations between consecutive contacts present in the data. Finally, we address the consequences of the intrinsically limited duration of many real world dynamical networks. Considering the fundamental prototypical role of the random walk process, we believe that these results could help to shed light on the behavior of more complex dynamics on temporally evolving networks.
ISSN: 1539-3755
URI: http://hdl.handle.net/2117/16405
DOI: 10.1103/PhysRevE.85.056115
Versió de l'editor: http://pre.aps.org/abstract/PRE/v85/i5/e056115
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