Schematic Without Numbers (IMAGE) Northwestern University Caption Schematic representation of the device, showing the current sources and the nanovolt meter (V)connections for one of the switching experiments. Credit Northwestern University and the University of Messina 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.