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Spatial versus sequential correlations for random access coding
Stockholm University, Faculty of Science, Department of Physics. Uniwersytet Gda´nski, Poland.
Stockholm University, Faculty of Science, Department of Physics. Universidade de S˜ao Paulo, Brazil.
Stockholm University, Faculty of Science, Department of Physics.
Number of Authors: 4
2016 (English)In: Physical Review A, ISSN 2469-9926, Vol. 93, no 3, 032336Article in journal (Refereed) Published
Abstract [en]

Random access codes are important for a wide range of applications in quantum information. However, their implementation with quantum theory can be made in two very different ways: (i) by distributing data with strong spatial correlations violating a Bell inequality or (ii) using quantum communication channels to create stronger-than-classical sequential correlations between state preparation and measurement outcome. Here we study this duality of the quantum realization. We present a family of Bell inequalities tailored to the task at hand and study their quantum violations. Remarkably, we show that the use of spatial and sequential quantum correlations imposes different limitations on the performance of quantum random access codes: Sequential correlations can outperform spatial correlations. We discuss the physics behind the observed discrepancy between spatial and sequential quantum correlations.

Place, publisher, year, edition, pages
2016. Vol. 93, no 3, 032336
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-129605DOI: 10.1103/PhysRevA.93.032336ISI: 000372709600003OAI: oai:DiVA.org:su-129605DiVA: diva2:923510
Available from: 2016-04-26 Created: 2016-04-26 Last updated: 2016-04-26Bibliographically approved

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Bourennane, Mohamed
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