Dopant Atoms (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Schematic representation of the ion trap (left) as the source of an ion beam to write a specific array of color centers into a crystal (right). Credit Ill./©: QUANTUM, Institute of Physics, JGU Usage Restrictions This image may only be used in connection with the press release "Researchers can now place single ions into solids", issued by Johannes Gutenberg University Mainz on September 24, 2019. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.