Europhys. Lett.
Volume 69, Number 2, January 2005
Page(s) 149 - 155
Section General
Published online 21 December 2004
Europhys. Lett., 69 (2), pp. 149-155 (2005)
DOI: 10.1209/epl/i2004-10343-x

Altruistic contents of quantum prisoner's dilemma

T. Cheon

Laboratory of Physics, Kochi University of Technology Tosa Yamada, Kochi 782-8502, Japan

received 30 July 2004; accepted in final form 16 November 2004
published online 21 December 2004

We examine the classical contents of quantum games. It is shown that a quantum strategy can be interpreted as a classical strategy with effective density-dependent game matrices composed of transposed matrix elements. In particular, successful quantum strategies in dilemma games are interpreted in terms of a symmetrized game matrix that corresponds to an altruistic game plan.

02.50.Le - Decision theory and game theory.
03.67.-a - Quantum information.
87.23.Ge - Dynamics of social systems.

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