Experiment exploiting quantum entanglement breaks distance record

Chinese scientists have transmitted the quantum version of computer memory between two entangled clouds of atoms over 50 kilometres. The feat, which was achieved using standard fibre optic cables, breaks through the 1.3 kilometre barrier achieved by previous quantum memory experiments. Entanglement — dubbed "spooky action at a distance" by Einstein — is a cornerstone of quantum physics. The ability to manipulate the spin, position and momentum of two — or more — entities separated by distance underlies future technologies such as secure communication systems.