Graphic Physical Process (IMAGE) Graz University of Technology Caption The Graz femtosecond experiment (top) excites acetone molecules with a first laser pulse and queries their temporal evolution with a second pulse in order to measure the energy flow in the molecule. Quantum simulations from Vienna provide the electron distribution of the excited states (bottom) and their time-dependent compositions, which provides more precise information about the energy flow and allows comparisons with the experiment. Credit © IEP - TU Graz 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.