Device could replace a roomful of equipment to link photons in a bizarre quantum effect called entanglement. It is a kind of nano-engineered material called a metasurface and paves the way for entangling photons in complex ways that have not been possible with compact technologies. The device is described in new research that was recently published in the journal Science. The efficiency of their device — the rate at which they can generate groups of entangled photons — is lower than that of other techniques and will need to be improved.Read Long Article
