Quantum voting and violation of Arrow's Impossibility Theorem
arXiv:1501.00458 · doi:10.1103/PhysRevA.95.062306
Abstract
We propose a quantum voting system, in the spirit of quantum games such as the quantum Prisoner's Dilemma. Our scheme enables a constitution to violate a quantum analog of Arrow's Impossibility Theorem. Arrow's Theorem is a claim proved deductively in economics: Every (classical) constitution endowed with three innocuous-seeming properties is a dictatorship. We construct quantum analogs of constitutions, of the properties, and of Arrow's Theorem. A quantum version of majority rule, we show, violates this Quantum Arrow Conjecture. Our voting system allows for tactical-voting strategies reliant on entanglement, interference, and superpositions. This contribution to quantum game theory helps elucidate how quantum phenomena can be harnessed for strategic advantage.
Version accepted by Phys. Rev. A. Added background and references about game theory and about Arrow's Theorem. Added an opportunity for further research. For citation purposes: The second author's family name is "Yunger Halpern" (not "Halpern")
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