Sven Scholz (IMAGE) Ruhr-University Bochum Caption Sven Scholz was awarded with a dissertation prize by the Wilhelm and Else Heraeus Foundation for generating the sample. Credit RUB, Kramer Usage Restrictions The image may only be used for reporting about the Ruhr-Universität Bochum in the context of the press release "Quantum communication: Detraction-free light-matter interaction", published in August 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.