2-D Cold-atom Gas (IMAGE) University of Chicago Caption In Cheng Chin's lab, a cloud of cesium atoms, shown as red balls, are confined on a horizontal plane and cooled to nano-Kelvin temperatures. An example of the measured atomic distribution is shown on the plane below the atoms, and reveals a universal scaling symmetry of physics in a two-dimensional quantum world. Credit Cheng Chin Usage Restrictions News organizations may use this image in connection with reports describing the research of Cheng Chin and his associates. 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.