Topological Light Array (IMAGE) Joint Quantum Institute Caption Light enters a two-dimensional ring-resonator array from the lower left and exits at the lower right. Light that follows the edge of the array (blue) does not suffer energy loss and exits after a consistent amount of delay. Light that travels into the interior of the array (green) suffers energy loss Credit Sean Kelley/JQI 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.