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Letter

Nature Physics 4, 681–685 (1 September 2008) | doi:10.1038/nphys1020

Testing quantum correlations versus single-particle properties within Leggett|[rsquo]|s|[nbsp]|model and beyond

Cyril Branciard , Nicolas Brunner , Nicolas Gisin , Christian Kurtsiefer , Antia Lamas-Linares , Alexander Ling & Valerio Scarani

Quantum theory predicts and experiments confirm that nature can produce correlations between distant events that are non-local in the sense of violating a Bell inequality. Nevertheless, Bell|[rsquo]|s strong sentence |[lsquo]|Correlations cry out for explanations|[rsquo]| (ref.|[nbsp]|2) remains relevant.