Entangled Atoms Shine in Unison (IMAGE) University of Innsbruck Caption Physicists compared the photon interference produced by entangled and non-entangled barium atoms. Credit IQOQI Innsbruck/Harald Ritsch Usage Restrictions The picture may be used for editorial purposes only. It is protected by copyright. The use is free of charge if the reference is mentioned. 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.