Quantum defects (IMAGE) University of Groningen Caption At the point at which the energy landscape splits, the high symmetry chain decays into a lower symmetry state when the critical point is passed. In this case, a straight chain decays into a zig-zag configuration when the anisotropy \lambda(t) passes a critical value \lambda_{c}. Where two consecutive ions fall onto the same side, a state of higher energy locally, we observe a defect. Credit Fernando Gómez-Ruiz - Donostia International Physics Center Usage Restrictions With credit 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.