Quantum mechanics: completely unhidden? A critical review of the work of Colbeck and Renner
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In this thesis a recent claim by Roger Colbeck and Renato Renner is reviewed. This claim concerns the completeness of quantum mechanics. Colbeck and Renner state that no theory can be constructed that is compatible with quantum mechanics, and gives more detailed predictions through supplemental variables added to the description of the state of a system. Their only assumption is that measurement settings can be choosen freely. We will argue that their result is for the most part valid and interesting, but the freedom assumption is not so innocent as it is presented, and parts of the result need to be clarified. Therefore, we will present a reformulation of the result. In our formulation the result is a no-go theorem for hidden variable theories satisfying Parameter Independence. This is a generalization of Bell’s theorem.