Physics – Quantum Physics
Scientific paper
2008-09-11
Physics
Quantum Physics
Abstract shortened and made clearer. A section relating our work to the Kochen Specker theorem has been added. Latex2e, 24 pag
Scientific paper
In standard measure theory the measure on the base set Omega is normalised to one, which encodes the statement that "Omega happens". Moreover, the rules imply that the measure of any subset A of Omega is strictly positive if and only if A cannot be covered by a collection of subsets of zero measure. In quantum measure theory on the other hand, simple examples suffice to demonstrate that this is no longer true. We propose an appropriate generalisation of a cover to quantum measure theory, the {\sl quantum cover}, which in addition to being a cover of A, satisfies the property that if every one of its elements has zero quantum measure, then so does A. We show that a large class of inextendible antichains in the associated powerset lattice provide quantum covers for Omega, for a quantum measure that derives from a strongly positive decoherence functional. Quantum covers, moreover, give us a new perspective on the Peres-Kochen-Specker theorem and its role in the anhomomorphic logic approach to quantum interpretation.
Surya Sumati
Wallden Petros
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