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Title: Entropic test of quantum contextuality
Authors: Kurzyński, P. 
Ramanathan, R. 
Kaszlikowski, D. 
Issue Date: 11-Jul-2012
Citation: Kurzyński, P., Ramanathan, R., Kaszlikowski, D. (2012-07-11). Entropic test of quantum contextuality. Physical Review Letters 109 (2) : -. ScholarBank@NUS Repository.
Abstract: We study the contextuality of a three-level quantum system using classical conditional entropy of measurement outcomes. First, we analytically construct the minimal configuration of measurements required to reveal contextuality. Next, an entropic contextual inequality is formulated, analogous to the entropic Bell inequalities derived by Braunstein and Caves, that must be satisfied by all noncontextual theories. We find optimal measurements for violation of this inequality. The approach is easily extendable to higher dimensional quantum systems and more measurements. Our theoretical findings can be verified in the laboratory with current technology. © 2012 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.109.020404
Appears in Collections:Staff Publications

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