A Coherant X-ray Speckle Pattern (IMAGE) University College London Caption By observing changes in coherent X-ray speckle pattern, such as the one shown above, researchers are able for the first time to investigate nanoscale dynamics of antiferromagnetic domain walls, and observe a cross over from classical to quantum behavior. Credit O. Shpyrko, Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Ill., 60439, USA 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.