The Big Chill (IMAGE) University of Chicago Caption University of Chicago physicist Thomas Rosenbaum, with the helium dilution refrigerator in his laboratory, where he observes the quantum behavior of materials chilled to temperatures approaching absolute zero. Credit Dan Dry Usage Restrictions This image may be used by news organizations in reports describing the research of Thomas Rosenbaum 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.