On the Nature of Continuous Physical Quantities in Classical and Quantum Mechanics

Journal of Philosophical Logic 30 (1):27-50 (2001)
Abstract
Within the traditional Hilbert space formalism of quantum mechanics, it is not possible to describe a particle as possessing, simultaneously, a sharp position value and a sharp momentum value. Is it possible, though, to describe a particle as possessing just a sharp position value (or just a sharp momentum value)? Some, such as Teller, have thought that the answer to this question is No - that the status of individual continuous quantities is very different in quantum mechanics than in classical mechanics. On the contrary, I shall show that the same subtle issues arise with respect to continuous quantities in classical and quantum mechanics; and that it is, after all, possible to describe a particle as possessing a sharp position value without altering the standard formalism of quantum mechanics
Keywords Boolean algebra  probability measure  unsharp quantum logic
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    Laura Ruetsche (2011). Why Be Normal? Studies in History and Philosophy of Science Part B 42 (2):107-115.
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