title: Randomness enhances cooperation: a resonance-type phenomenon in evolutionary games.
abstract: We investigate the effect of randomness in both relationships and decisions on the evolution of cooperation. Simulation results show, in such randomness' presence, the system evolves more frequently to a cooperative state than in its absence. Specifically, there is an optimal amount of randomness, which can induce the highest level of cooperation. The mechanism of randomness promoting cooperation resembles a resonancelike fashion, which could be of particular interest in evolutionary game dynamics in economic, biological, and social systems.
authors.affiliation: Department of Physics, University of Fribourg, Fribourg, Switzerland.
authors.forename: Jie
authors.initials: J
authors.lastname: Ren
authors.forename: Wen-Xu
authors.initials: WX
authors.lastname: Wang
authors.forename: Feng
authors.initials: F
authors.lastname: Qi