Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-01-25
Phys. Rev. E 71, 066107 (2005)
Physics
Condensed Matter
Statistical Mechanics
12 pages, 12 figures
Scientific paper
10.1103/PhysRevE.71.066107
We study numerically the ordering process of two very simple dynamical models for a two-state variable on several topologies with increasing levels of heterogeneity in the degree distribution. We find that the zero-temperature Glauber dynamics for the Ising model may get trapped in sets of partially ordered metastable states even for finite system size, and this becomes more probable as the size increases. Voter dynamics instead always converges to full order on finite networks, even if this does not occur via coherent growth of domains. The time needed for order to be reached diverges with the system size. In both cases the ordering process is rather insensitive to the variation of the degreee distribution from sharply peaked to scale-free.
Barrat Alain
Castellano Claudio
Cecconi Federico
Loreto Vittorio
Parisi Domenico
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