BEC Ang Mom Transfer Full Photo (IMAGE) DOE/Argonne National Laboratory Caption Merging dynamics of two BECs, one rotating and one stationary. Density evolution of each drop is shown in the top row, and angular momentum transfer is shown in the bottom row. Angular momentum is transferred due to the spontaneous emergence of a corkscrew structure at the interface. Credit Image by the Center for Nanoscale Materials. 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.