The experimental setup (IMAGE) Institute of Science and Technology Austria Caption The experimental setup with the dilution refrigerator, the superconducting cavity, and the electro-optic crystal splitting and entangling the photons. Credit Mark Belan/ISTA Usage Restrictions Usable for reporting about this news item. License Original 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.