Comment on `Quantum Games and Quantum Strategies'

Details Comment on `Quantum Games and Quantum Strategies' Comment on `Quantum Games and Quantum Strategies'

2000-03-09

arxiv.org/abs/quant-ph/0003036v1

Phys. Rev. Lett. 87(6):069801, 2001.

Physics

Quantum Physics

2 pages, 1 figure. Please address correspondence to s.benjamin@qubit.org

Scientific paper

10.1103/PhysRevLett.87.069801

In a recent paper, Eisert et al. presented a quantum mechanical generalization of Prisoner's Dilemma. They asserted that the maximally entangled game exhibits a unique Nash equilibrium which yields a pay-off equivalent to cooperative behaviour. In this comment we show that their observation is incorrect: there is no Nash equilibrium in the space of deterministic quantum strategies.

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