Rydberg Atoms (IMAGE) U.S. Army Research Laboratory Caption Rydberg atoms are optically excited to Rydberg states that detect incoming radio frequency fields in this artist's interpretation. Credit U.S. Army Usage Restrictions None 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.