Optimal Size of a Complex Network

Details Optimal Size of a Complex Network Optimal Size of a Complex Network

2003-02-20

arxiv.org/abs/cond-mat/0302400v1

Phys. Rev. E 67, 046101 (2003)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 6 figures. To appear in PRE

Scientific paper

10.1103/PhysRevE.67.046101

We investigate the response behavior of an Ising system, driven by an oscillating field, on a small-world network, with particular attention to the effects of the system size. The responses of the magnetization to the driving field are probed by means of Monte Carlo dynamic simulations with the rewiring probability varied. It is found that at low and high temperatures the occupancy ratio, measuring how many spins follow the driving field, behaves monotonically with the system size. At intermediate temperatures, on the other hand, the occupancy ratio first grows and then reduces as the size is increased, displaying a resonance-like peak at a finite value of the system size. In all cases, further increase of the size eventually leads to saturation to finite values; the size at which saturation emerges is observed to depend on the temperature, similarly to the correlation length of the system.

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