Vortex Rings (image) University of Cambridge Caption This shows vortex rings as the result of vortex multiplication in a quantum fluid. Some electrons are free, some got trapped by one or more vortices. Credit Gleb and Sofia Berloff, ISM Usage Restrictions Attribution 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.