The effect of quantum noise on multiplayer quantum game

It has recently been realized that quantum strategies have a great advantage over classical ones in quantum games. However, quantum states are easily affected by the quantum noise, resulting in decoherence. In this paper, we investigate the effect of quantum noise on a multiplayer quantum game with a certain strategic space, with all players affected by the same quantum noise at the same time. Our results show that in a maximally entangled state, a special Nash equilibrium appears in the range of 0p0.622 (p is the quantum noise parameter), and then disappears in the range of 0.622<p1. Increasing the amount of quantum noise leads to the reduction of the quantum player's payoff. © 2007 Chin. Phys. Soc. and IOP Publishing Ltd.