Fusion's triple product (VIDEO) Zap Energy This video is under embargo. Please login to access this video. Caption Hot enough, dense enough, for long enough — the three variables of temperature, density and time are collectively known in fusion as the triple product. And while there are different ways to create fusion, all must scale up triple product to achieve net energy gains. Credit Zap Energy Usage Restrictions Copyright Zap Energy 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.