Effective quantum observables

@article{Brunner1995EffectiveQO,
  title={Effective quantum observables},
  author={Norbert Brunner and Karl Svozil and Matthias Baaz},
  journal={Il Nuovo Cimento B (1971-1996)},
  year={1995},
  volume={110},
  pages={1397-1413}
}
SummaryWe construct a quantum-theoretic formalism which is meaningful also in the absence of the axiom of choice. In terms of the standard formalism the observables correspond to the intrinsically effective Hamiltonians. Here a self-adjoint operator is intrinsically effective iff the Schrödinger equation of its generated semigroup is soluble by means of eigenfunction series expansions. As an application we investigate quantum theory in models of set theory, where the axiom of choice is violated… 
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