Experimental fully contextual correlations
2012 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 108, no 20, 200405- p.Article in journal (Refereed) Published
Quantum correlations are contextual yet, in general, nothing prevents the existence of even more contextual correlations. We identify and test a noncontextuality inequality in which the quantum violation cannot be improved by any hypothetical postquantum theory, and use it to experimentally obtain correlations in which the fraction of noncontextual correlations is less than 0.06. Our correlations are experimentally generated from the results of sequential compatible tests on a four-state quantum system encoded in the polarization and path of a single photon.
Place, publisher, year, edition, pages
2012. Vol. 108, no 20, 200405- p.
IdentifiersURN: urn:nbn:se:su:diva-79754DOI: 10.1103/PhysRevLett.108.200405ISI: 000307068600001OAI: oai:DiVA.org:su-79754DiVA: diva2:552001
FunderSwedish Research CouncilThe Wenner-Gren Foundation