Authors
Tobias Fritz, Ana Belén Sainz, Remigiusz Augusiak, J Bohr Brask, Rafael Chaves, Anthony Leverrier, Antonio Acín
Publication date
2013/8/16
Journal
Nature communications
Volume
4
Issue
1
Pages
2263
Publisher
Nature Publishing Group UK
Description
In recent years, the use of information principles to understand quantum correlations has been very successful. Unfortunately, all principles considered so far have a bipartite formulation, but intrinsically multipartite principles, yet to be discovered, are necessary for reproducing quantum correlations. Here we introduce local orthogonality, an intrinsically multipartite principle stating that events involving different outcomes of the same local measurement must be exclusive or orthogonal. We prove that it is equivalent to no-signalling in the bipartite scenario but more restrictive for more than two parties. By exploiting this non-equivalence, it is then demonstrated that some bipartite supra-quantum correlations do violate the local orthogonality when distributed among several parties. Finally, we show how its multipartite character allows revealing the non-quantumness of correlations for which any bipartite principle fails. We …
Total citations
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Scholar articles
T Fritz, AB Sainz, R Augusiak, JB Brask, R Chaves… - Nature communications, 2013
T Fritz, A Sainz, R Augusiak, JB Brask, R Chaves… - arXiv preprint arXiv:1210.3018