Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2007-10-17
Phys. Rev. E 77, 020103 (2008)
Physics
Condensed Matter
Statistical Mechanics
5 pages, 3 figures
Scientific paper
10.1103/PhysRevE.77.020103
We introduce a model for diffusion of two classes of particles ($A$ and $B$) with priority: where both species are present in the same site the motion of $A$'s takes precedence over that of $B$'s. This describes realistic situations in wireless and communication networks. In regular lattices the diffusion of the two species is normal but the $B$ particles are significantly slower, due to the presence of the $A$ particles. From the fraction of sites where the $B$ particles can move freely, which we compute analytically, we derive the diffusion coefficients of the two species. In heterogeneous networks the fraction of sites where $B$ is free decreases exponentially with the degree of the sites. This, coupled with accumulation of particles in high-degree nodes leads to trapping of the low priority particles in scale-free networks.
Argyrakis Panos
ben-Avraham Daniel
Carmi Shai
Havlin Shlomo
Maragakis Michalis
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