Josephson effect

The Josephson Effect is a phenomenon observed in superconductors, where a current flows between two superconducting materials separated by a thin insulating layer, without any applied voltage. This effect allows for the movement of pairs of electrons, called Cooper pairs, to tunnel through the barrier. As a result, this leads to very precise voltage measurements and is crucial in applications like quantum computing and highly sensitive magnetometers. Essentially, it showcases the unique quantum behavior of superconductors, enabling technologies that rely on ultra-low power and high-speed electronic signals.