E-Mail IMAGE: Based on the Europium(III) scientists aim to advance the development of Quantum Computers. view more Credit: S. Kuppusamy, KIT Light can be used to operate quantum information processing systems, e.g. quantum computers, quickly and efficiently. Researchers at Karlsruhe Institute of Technology (KIT) and Chimie ParisTech/CNRS have now significantly advanced the development of molecule-based materials suitable for use as light-addressable fundamental quantum units. As they report in the journal Nature Communications, they have demonstrated for the first time the possibility of addressing nuclear spin levels of a molecular complex of europium(III) rare-earth ions with light. (DOI: 10.1038/s41467-021-22383-x)