Optical setup (IMAGE) Optica Caption A new high-purity single photon source that can operate at room temperature is an important step toward practical applications of quantum technology, such as highly secure communication based on quantum key distribution. Helen Zeng is pictured. Credit Helen Zeng, University of Technology Sydney 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.