Quantum Hall Effect (image) RIKEN Caption This is a depiction of the quantum Hall effect (left) and the quantum anomalous Hall effect (right). Credit RIKEN Usage Restrictions The image may only be used with appropriate caption or credit. 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.