Quantum networks can be practically implemented to interface with different quantum systems. In order to photonically link hybrid systems with combined unique properties of each constituent system, scientists must integrate sources with the same photon emission wavelength. For instance, trapped ions and neutral atoms can both have compelling properties as nodes and memories within quantum networks but without photonic linking due to their vastly different operating wavelengths. In a recent report on Science Advances, J.D. Siverns and colleagues at the Joint Quantum Institute, Department of Physics and the Army Research Laboratory in the U.S. demonstrated the first interaction between neutral atoms and photons emitted from a single trapped ion.
Source:
https://phys.org/news/2019-10-rubidium-vapor-photons-ion.html