Spatial versus sequential correlations for random access coding

Armin Tavakoli , Breno Marques , Marcin Pawłowski , Mohamed Bourennane


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.
Author Armin Tavakoli
Armin Tavakoli,,
, Breno Marques
Breno Marques,,
, Marcin Pawłowski (FMPI/ITPA)
Marcin Pawłowski,,
- Institute of Theoretical Physics and Astrophysics
, Mohamed Bourennane
Mohamed Bourennane,,
Journal seriesPhysical Review A, ISSN 1050-2947, (A 35 pkt)
Issue year2016
Publication size in sheets0.50
ASJC Classification3107 Atomic and Molecular Physics, and Optics
Languageen angielski
Score (nominal)35
Score sourcejournalList
ScoreMinisterial score = 35.0, 03-02-2020, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 03-02-2020, ArticleFromJournal
Publication indicators WoS Citations = 8.000; Scopus SNIP (Source Normalised Impact per Paper): 2016 = 0.985; WoS Impact Factor: 2018 = 2.907 (2) - 2018=2.723 (5)
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