Bell correlations measured in half a million atoms
(PHYSorg.com Physics)

(Phys.org)-Physicists have demonstrated Bell correlations in the largest physical system to date-an ensemble of half a million atoms at an ultracold temperature of 25 µK. The presence of Bell correlations indicates that all of the atoms share nonlocal quantum correlations with each other. These correlations could one day be used in quantum information systems and to design new tests of quantum mechanics.