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Sebastian Fortin, Olimpia Lombardi
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conference paper description
In this paper it will be argued that any realist interpretation of quantum mechanics intending to preserve the objectivity of the set of the definite-valued observables should require such a set to be invariant under the symmetry group of the theory. In particular, it will be shown that the natural way to reach this goal is to appeal to the Casimir operators of the Galilean group. Additionally, this idea will be generalized in two ways: (i) by selecting the definite-valued observables of a system in quantum field theory as those represented by the Casimir operators of the Poincaré group, and (ii) by extending the strategy to gauge symmetries.

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