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Synchronization of Local Oscillations in a Spatial Rock−Scissors−Paper Game Model

We study a spatial rock−scissors−paper model in a square lattice and a quenched small-world network. The system exhibits a global oscillation in the quenched small-world network, but the oscillation disappears in the square lattice. We find that there is a local oscillation in the square lattice the same as in the quenched small-world network. We define (where di is the density of a kind of species and ⟨di⟩ is the average value) as the variance of the oscillation amplitude in a certain local patch. It is found that s decays in a power law with an increase of the local patch size R in the square lattice σ ∝ R−δ, but it remains constant with an increase of the patch size in the quenched small-world network. We can speculate that in the square lattice, superposition between the local oscillations in different patches leads to global stabilization, while in the quenched small-world network, long-range interactions can synchronize the local oscillations, and their coherence results in the global oscillation.