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Reaction–diffusion processes and metapopulation models in heterogeneous networks

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Colizza, Vittoria, Pastor-Satorras, Romualdo, Vespignani, Alessandro·2007·Nature Physics

Abstract

Dynamical reaction–diffusion processes and metapopulation models are standard modelling approaches for a wide array of phenomena in which local quantities—such as density, potentials and particles—diffuse and interact according to the physical laws. Here, we study the behaviour of the basic reaction–diffusion process (given by the reaction steps B→A and B+A→2B) defined on networks with heterogeneous topology and no limit on the nodes’ occupation number. We investigate the effect of network topology on the basic properties of the system’s phase diagram and find that the network heterogeneity sustains the reaction activity even in the limit of a vanishing density of particles, eventually suppressing the critical point in density-driven phase transitions, whereas phase transition and critical points independent of the particle density are not altered by topological fluctuations. This work lays out a theoretical and computational microscopic framework for the study of a wide range of realistic metapopulation and agent-based models that include the complex features of real-world networks.

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Metadata

Authors
Colizza, V., Pastor-Satorras, R., & Vespignani, A.
Venue
Nature Physics
Published
2007-03-04
Volume
3
Issue
4
Pages
276-282
ISSN
  • 1745-2473 (ISSN-L)
  • 1745-2481
OpenAlex
W2146530408
Cited by
869
References
36
FWCI
17.79
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Reaction–diffusion processes and metapopulation models in heterogeneous networks. https://app.cochat.ai/papers/10.1038/nphys560
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Colizza, V., Pastor-Satorras, R., & Vespignani, A. (2007). Reaction–diffusion processes and metapopulation models in heterogeneous networks. Nature Physics. https://doi.org/10.1038/nphys560

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