Quantum theory as a universal physical theory
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- Deutsch, D. Int J Theor Phys (1985) 24: 1. doi:10.1007/BF00670071
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The problem of setting up quantum theory as a universal physical theory is investigated. It is shown that the existing formalism, in either the conventional or the Everett interpretation, must be supplemented by an additional structure, the “interpretation basis.” This is a preferred ordered orthonormal basis in the space of states. Quantum measurement theory is developed as a tool for determining the interpretation basis. The augmented quantum theory is discussed.