Strong nonlocality: a trade-off between states and measurements

Anthony J. Short, Jonathan Barrett

Research output: Contribution to journalArticle (Academic Journal)peer-review

48 Citations (Scopus)


Measurements on entangled quantum states can produce outcomes that are nonlocally correlated. But according to Tsirelson's theorem, there is a quantitative limit on quantum nonlocality. It is interesting to explore what would happen if Tsirelson's bound were violated. To this end, we consider a model that allows arbitrary nonlocal correlations, colloquially referred to as 'box world'. We show that while box world allows more highly entangled states than quantum theory, measurements in box world are rather limited. As a consequence there is no entanglement swapping, teleportation or dense coding.

Original languageEnglish
Article number033034
Pages (from-to)-
Number of pages19
JournalNew Journal of Physics
Publication statusPublished - 19 Mar 2010


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