Wang-Hazzard Commutativity Graph (IMAGE) Rice University Caption A Wang-Hazzard commutativity graph captures the microscopic detail of the mathematical functions physicists typically use to describe energy in quantum systems, reducing the calculation of quantum speed limits to an equation with just two inputs. Credit Image courtesy of Zhiyuan Wang/Rice University Usage Restrictions Must credit: Zhiyuan Wang/Rice University 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.