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Critical phenomena and finite-size effects in growing networks

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Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)

Abstract

We review known critical effects in various cooperative models on growing networks, as well as structural transitions in these networks, and present a unified approach to these phenomena. Also, we discuss finite-size scaling in networks in the framework of a general phenomenological theory and describe basic finite-size effects. We demonstrate and explain the universality of the critical phenomena in random recursive graphs, some deterministic networks, and a more general class of evolving networks. We explain the nature of the Berezinskii-Kosterlitz-Thouless-like singularities which frequently occur in these networks. By using the example of the $(q>2)$-state Potts model, we demonstrate the transformation of even a first order phase transition to infinite order transition. Finally, we give a unified description of the correlations in cooperative models on complex networks. We present our new results on the critical statistics of the correlation volume in networks and apply them to a number of basic models. 1 S. N. Dorogovtsev, A. V. Goltsev, and J.F.F. Mendes, ``Critical phenomena in complex networks'', to be published. 2 S.N. Dorogovtsev, A.V. Goltsev, and J.F.F. Mendes, ``Correlations in interacting systems with a network topology'', Phys. Rev. E 72, 066130 (2005). 3 E. Khajeh, S. N. Dorogovtsev, and J. F. F. Mendes, ``BKT-like transition in the Potts model on an inhomogeneous annealed network'', cond-mat/0701156. 4 S. N. Dorogovtsev, A. V. Goltsev, and J. F. F. Mendes, ``$k$-core organization of complex networks'', Phys. Rev. Lett. 96, 040601 (2006). 5 S. N. Dorogovtsev and J. F. F. Mendes, ``Evolution of Networks: From Biological Nets to the Internet and WWW'' (Oxford University Press, Oxford, 2003); Adv. Phys. 51, 1079 (2002). 6 S. N. Dorogovtsev, J. F. F. Mendes, and A. N. Samukhin, ``Anomalous percolation properties of growing networks'', Phys. Rev. E 64, 066110 (2001). 7 A. V. Goltsev, S. N. Dorogovtsev, and J. F. F. Mendes, ``$k$-core (bootstrap) percolation on complex networks: Critical phenomena and nonlocal effects'', Phys. Rev. E 73, 056101 (2006).

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