A Practical Quantum Mechanism for the Public Goods Game

Details A Practical Quantum Mechanism for the Public Goods Game A Practical Quantum Mechanism for the Public Goods Game

2003-01-06

arxiv.org/abs/quant-ph/0301013v1

Quantum Information Processing 1:449-469 (2002)

Physics

Quantum Physics

9 pages, revtex4

Scientific paper

Quantum generalizations of conventional games broaden the range of available strategies, which can help improve outcomes for the participants. With many players, such quantum games can involve entanglement among many states which is difficult to implement, especially if the states must be communicated over some distance. This paper describes a quantum mechanism for the economically significant $n$-player public goods game that requires only two-particle entanglement and is thus much easier to implement than more general quantum mechanisms. In spite of the large temptation to free ride on the efforts of others in this game, two-particle entanglement is sufficient to give near optimal expected payoff when players use a simple mixed strategy for which no player can benefit by making different choices. This mechanism can also address some heterogeneous preferences among the players.

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