Quantum logical calculi and lattice structures |
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Authors: | E. -W. Stachow |
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Affiliation: | (1) University of Western Ontario, London, Canada;(2) Present address: Institut für Theoretische Physik der Universität zu Köln, Zülpicherstr. 77, 5000 Köln 41, Germany |
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Abstract: | In a preceding paper [1] it was shown that quantum logic, given by the tableaux-calculus Teff, is complete and consistent with respect to the dialogic foundation of logics. Since in formal dialogs the special property of the value-definiteness of propositions is not postulated, the calculus Teff represents a calculus of effective (intuitionistic) quantum logic.Beginning with the tableaux-calculus the equivalence of Teff to calculi which use more familiar figures such as sequents and implications can be investigated. In this paper we present a sequents-calculus of Gentzen-type and a propositional calculus of Brouwer-type which are shown to be equivalent to Teff. The effective propositional calculus provides an interpretation for a lattice structure, called quasi-implicative lattice. If, in addition, the value-definiteness of quantum mechanical propositions is postulated, a propositional calculus is obtained which provides an interpretation for a quasi-modular orthocomplemented lattice which, as is well-known, has as a model the lattice of subspaces of a Hilbert space. |
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