Three's a charm: NIST detectors reveal entangled photon triplets
Researchers at the Institute for Quantum Computing at the University of À¶Ý®ÊÓÆµ in Canada have directly entangled three photons in the most technologically useful state for the first time, thanks in part to superfast, super-efficient single-photon detectors developed by the National Institute of Standards and Technology (NIST).