First Experiment to Verify PT Symmetry (IMAGE) Washington University in St. Louis Caption A simple benchtop experiment was the first to confirm a prediction that followed from PT symmetry. Credit Courtesy photograph, Washington University in St. Louis 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.