Experimental Fully Contextual Correlations
2012; American Physical Society; Volume: 108; Issue: 20 Linguagem: Inglês
10.1103/physrevlett.108.200405
ISSN1092-0145
AutoresElias Amselem, Lars Eirik Danielsen, Antonio J. López-Tarrida, José R. Portillo, Mohamed Bourennane, Adán Cabello,
Tópico(s)Advanced Thermodynamics and Statistical Mechanics
ResumoQuantum 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.
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