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  1.  52
    Remarks on Two-Slit Probabilities.E. G. Beltrametti & S. Bugajski - 2000 - Foundations of Physics 30 (9):1415-1429.
    The probability pattern emerging in two-slit experiments is a typical quantum feature whose essential ingredients are examined by translating them into the spin- $ \frac{1}{2} $ formalism. In view of the existence of extensions of quantum theory preserving some classical structure, we discuss how the two-slit probabilities behave under such extensions. We consider a generalization of the standard classical probability theory, to be called operational probability theory, that turns out to host the so called quantum probabilities.
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  2.  89
    Quantum Mechanics and Operational Probability Theory.E. G. Beltrametti & S. Bugajski - 2002 - Foundations of Science 7 (1-2):197-212.
    We discuss a generalization of the standard notion of probability space and show that the emerging framework, to be called operational probability theory, can be considered as underlying quantal theories. The proposed framework makes special reference to the convex structure of states and to a family of observables which is wider than the familiar set of random variables: it appears as an alternative to the known algebraic approach to quantum probability.
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  3.  29
    Quantum Mechanics Andp-Adic Numbers.E. G. Beltrametti & G. Cassinelli - 1972 - Foundations of Physics 2 (1):1-7.
    We study the possibility of representing the proposition lattice associated with a quantum system by a linear vector space with coefficients from ap-adic field. We find inconsistencies if the lattice is assumed, as usual, to be irreducible, complete, orthocomplemented, atomic, and weakly modular.
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  4.  42
    On State Transformations Induced by Yes-No Experiments, in the Context of Quantum Logic.E. G. Beltrametti & G. Cassinelli - 1977 - Journal of Philosophical Logic 6 (1):369 - 379.