Coherence resonance in a spatial prisoner's dilemma gamePerc, Matjaž (Avtor) dynamic systemsnoisespatiotemporal noiseintensityspatial resonanceinherent spatial resonancespatial decoherenceexcitable mediaWe study effects of additive spatiotemporal random variations, introduced to the payoffs of a spatial prisoner's dilemma game, on the evolution of cooperation. In the absence of explicit payoff variations the system exhibits a phase transition from a mixed state of cooperators and defectors to a homogenous state of defectors belonging to the directed percolation universality class. By introducing nonzero random variations to the payoffs, this phase transition can be reverted in a resonance-like manner depending on the variance of noise, thus marking coherence resonance in the system. We argue that explicit random payoff variations present a viable mechanism that promotes cooperation for defection temptation values substantially exceeding the one marking the transition point to homogeneity by deterministic payoffs.20062012-06-07 12:38:09Članek v reviji35943ISSN: 1367-2630UDK: 534.83:531.3OceCobissID: 21135621COBISS_ID: 14504456DOI: 10.1088/1367-2630/8/2/022ISSN pri članku: 1367-2630NUK URN: URN:SI:UM:DK:NIQJWOVMsl