[Perspective] Diamond defects cooperate via light
Quantum light–matter interfaces operating at optical wavelengths are key to emerging applications in quantum information processing such as distributed quantum computing and secure quantum communication (1). In the past decade, such interfaces have been successfully implemented across platforms ranging from trapped atoms and ions to quantum dots to defect centers in diamond. On the other hand, integrating and optically coupling several optical emitters within a single device has proven to be a more demanding goal. On page 847 of this issue, Sipahigil et al. (2) report on an all-diamond nanophotonics platform that enables efficient coupling of quantum emitters to onchip cavities and waveguides. These results could pave the way for large on-chip quantum networks and novel quantum science experiments. Author: Ronald Hanson