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Title: Generalized monogamy of contextual inequalities from the no-disturbance principle
Authors: Ramanathan, R. 
Soeda, A.
Kurzyński, P. 
Kaszlikowski, D. 
Issue Date: 1-Aug-2012
Citation: Ramanathan, R., Soeda, A., Kurzyński, P., Kaszlikowski, D. (2012-08-01). Generalized monogamy of contextual inequalities from the no-disturbance principle. Physical Review Letters 109 (5) : -. ScholarBank@NUS Repository.
Abstract: In this Letter, we demonstrate that the property of monogamy of Bell violations seen for no-signaling correlations in composite systems can be generalized to the monogamy of contextuality in single systems obeying the Gleason property of no disturbance. We show how one can construct monogamies for contextual inequalities by using the graph-theoretic technique of vertex decomposition of a graph representing a set of measurements into subgraphs of suitable independence numbers that themselves admit a joint probability distribution. After establishing that all the subgraphs that are chordal graphs admit a joint probability distribution, we formulate a precise graph-theoretic condition that gives rise to the monogamy of contextuality. We also show how such monogamies arise within quantum theory for a single four-dimensional system and interpret violation of these relations in terms of a violation of causality. These monogamies can be tested with current experimental techniques. © 2012 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.109.050404
Appears in Collections:Staff Publications

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