Hi, I am confused about josephson effect. Take SNS for example. If the phase of these two superconductors are different, then there will be a josephson current through the junction. Experimentally, do we measure the current by attach two ends of SNS with a wire? If there is no wire attached to these two ends, will there be a current flowing through the junction? In other words, will there be a self-generated current in it without a loop? Thanks for you help.