Laser Stirring Up Superfluid (video) Joint Quantum Institute Loading video... Caption This is an animation showing a laser beam stirring a ring shaped quantum gas. Credit G. Campbell and authors on research paper Usage Restrictions Reproduce with permission of authors. 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.