Editing Bell test (section)

=== Schmied et al. (2016): Detection of Bell correlations in a many-body system ===
Using a witness for Bell correlations derived from a multi-partite Bell inequality, physicists at the [[University of Basel]] were able to conclude for the first time Bell correlation in a many-body system composed by about 480 atoms in a [[Bose–Einstein condensate]]. Even though loopholes were not closed, this experiment shows the possibility of observing Bell correlations in the macroscopic regime.<ref>{{cite journal | last1 = Schmied | first1 = R. | last2 = Bancal | first2 = J.-D. | last3 = Allard | first3 = B. | last4 = Fadel | first4 = M. | last5 = Scarani | first5 = V. | last6 = Treutlein | first6 = P. | last7 = Sangouard | first7 = N. | year = 2016 | title = Bell correlations in a Bose–Einstein condensate | journal = Science | volume = 352 | issue = 6284 | pages = 441–4 | doi = 10.1126/science.aad8665 | pmid = 27102479 |arxiv = 1604.06419 | bibcode = 2016Sci...352..441S | s2cid = 206645325 }}</ref>