Experimental Bell inequality violation closing the detection and locality/communication loopholes.


The first measurement of the violation of Bell's inequality free of the detection and locality/communication loopholes has been claimed by physicists in the Netherlands, Spain and the UK.

The experimenters entangle spins in diamonds separated by 1.28 km and then measure correlations between the spins. The large separation between the diamonds and the relative ease with which the spins can be measured ensures that the locality/communication and detection loopholes are closed by the experiment.

A preprint is available here. A summary can be found, e.g., here.