Abstract
The total and the sharp character of orthodox quantum logic has been put in question in different contexts. This paper presents the basic ideas for a unified approach to partial and unsharp forms of quantum logic. We prove a completeness theorem for some partial logics based on orthoalgebras and orthomodular posets. We introduce the notion of unsharp orthoalgebra and of generalized MV algebra. The class of all effects of any Hilbert space gives rise to particular examples of these structures. Finally, we investigate the relationship between unsharp orthoalgebras, generalized MV algebras, and orthomodular lattices.
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Dalla Chiara, M.L., Giuntini, R. Partial and unsharp quantum logics. Found Phys 24, 1161–1177 (1994). https://doi.org/10.1007/BF02057862
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DOI: https://doi.org/10.1007/BF02057862