(IMAGE) ICFO-The Institute of Photonic Sciences Caption Artistic representation of chiral interactions in an ultracold cloud of atoms dressed with light, which make it behave differently from its mirror image and are the smoking gun of the realization of a topological gauge theory. Credit Image credit: ICFO/Scixel Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.