title: Effects of adaptive degrees of trust on coevolution of quantum strategies on scale-free networks.
abstract: We study the impact of adaptive degrees of trust on the evolution of cooperation in the quantum prisoner's dilemma game. In addition to the strategies, links between players are also subject to evolution. Starting with a scale-free interaction network, players adjust trust towards their neighbors based on received payoffs. The latter governs the strategy adoption process, while trust governs the rewiring of links. As soon as the degree of trust towards a neighbor drops to zero, the link is rewired to another randomly chosen player within the network. We find that for small temptations to defect cooperators always dominate, while for intermediate and strong temptations a single quantum strategy is able to outperform all other strategies. In general, reciprocal trust remains within close relationships and favors the dominance of a single strategy. Due to coevolution, the power-law degree distributions transform to Poisson distributions.
authors.affiliation: State Key Laboratory of Power Transmission Equipment & System Security and New Technology, College of Electrical Engineering, Chongqing University, 400044 Chongqing, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Minyou
authors.initials: M
authors.lastname: Chen
authors.forename: Matjaž
authors.initials: M
authors.lastname: Perc
authors.forename: Azhar
authors.initials: A
authors.lastname: Iqbal
authors.forename: Derek
authors.initials: D
authors.lastname: Abbott
mesh_terms: D000223:Adaptation, Psychological; D003299:Cooperative Behavior; D005716:Game Theory; D006801:Humans; D008962:Models, Theoretical; D035502:Trust / Q000523:psychology*