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Title: Quantum covers in quantum measure theory
Authors: Surya, Sumati
Wallden, Petros
Keywords: quantum interpretation
quantum measure theory
quantum topology
lattice theory
Issue Date: Jun-2010
Publisher: Springer
Citation: Foundations of Physics, 2010, Vol.40, p585
Abstract: Sorkin’s recent proposal for a realist interpretation of quantum theory, the anhomomorphic logic or coevent approach, is based on the idea of a “quantum measure” on the space of histories. This is a generalisation of the classical measure to one which admits pair-wise interference and satisfies a modified version of the Kolmogorov probability sum rule. In standard measure theory the measure on the base set Ω is normalised to one, which encodes the statement that “Ω happens”. Moreover, the Kolmogorov sum rule implies that the measure of any subset A is strictly positive if and only if A cannot be covered by a countable 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, the quantum cover, which in addition to being a cover of A, satisfies the property that if the quantum measure of A is non-zero then this is also the case for at least one of the elements in the cover. Our work implies a non-triviality result for the coevent interpretation for Ω of finite cardinality, and allows us to cast the Peres-Kochen-Specker theorem in terms of quantum covers
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 1572-9516 (Online)
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Copyright: 2010 Springer
Appears in Collections:Research Papers (TP)

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