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Article: The relativistic causality versus no-signaling paradigm for multi-party correlations

TitleThe relativistic causality versus no-signaling paradigm for multi-party correlations
Authors
Issue Date2019
Citation
Nature Communications, 2019, v. 10, n. 1, article no. 1701 How to Cite?
Abstract© 2019, The Author(s). The ubiquitous no-signaling constraints state that the probability distributions of outputs of any subset of parties in a Bell experiment are independent of remaining parties’ inputs. These constraints are considered to form ultimate limits for physical correlations and led to the fields of post-quantum cryptography, randomness generation besides identifying information-theoretic principles underlying quantum theory. Here we show that while these constraints are sufficient, they are not necessary to enforce relativistic causality in multi-party correlations, i.e., the rule that correlations do not allow casual loops. Depending on the space-time coordinates of the measurement events, causality only imposes a subset of no-signaling conditions. We first consider the n-party Bell experiment (n > 2) and identify all configurations where subsets of the constraints suffice. Secondly, we examine the implications for device-independent cryptography against an eavesdropper constrained only by relativity, detailing among other effects explicit attacks on well-known randomness amplification and key distribution protocols.
Persistent Identifierhttp://hdl.handle.net/10722/276644
ISSN
2017 Impact Factor: 12.353
2015 SCImago Journal Rankings: 6.539
PubMed Central ID

 

DC FieldValueLanguage
dc.contributor.authorHorodecki, Paweł-
dc.contributor.authorRamanathan, Ravishankar-
dc.date.accessioned2019-09-18T08:34:13Z-
dc.date.available2019-09-18T08:34:13Z-
dc.date.issued2019-
dc.identifier.citationNature Communications, 2019, v. 10, n. 1, article no. 1701-
dc.identifier.issn2041-1723-
dc.identifier.urihttp://hdl.handle.net/10722/276644-
dc.description.abstract© 2019, The Author(s). The ubiquitous no-signaling constraints state that the probability distributions of outputs of any subset of parties in a Bell experiment are independent of remaining parties’ inputs. These constraints are considered to form ultimate limits for physical correlations and led to the fields of post-quantum cryptography, randomness generation besides identifying information-theoretic principles underlying quantum theory. Here we show that while these constraints are sufficient, they are not necessary to enforce relativistic causality in multi-party correlations, i.e., the rule that correlations do not allow casual loops. Depending on the space-time coordinates of the measurement events, causality only imposes a subset of no-signaling conditions. We first consider the n-party Bell experiment (n > 2) and identify all configurations where subsets of the constraints suffice. Secondly, we examine the implications for device-independent cryptography against an eavesdropper constrained only by relativity, detailing among other effects explicit attacks on well-known randomness amplification and key distribution protocols.-
dc.languageeng-
dc.relation.ispartofNature Communications-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleThe relativistic causality versus no-signaling paradigm for multi-party correlations-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/s41467-019-09505-2-
dc.identifier.pmid30979876-
dc.identifier.pmcidPMC6461635-
dc.identifier.scopuseid_2-s2.0-85064339366-
dc.identifier.volume10-
dc.identifier.issue1-
dc.identifier.spagearticle no. 1701-
dc.identifier.epagearticle no. 1701-

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