Josephson junction

A Josephson junction is a small electronic device made of two superconductors separated by a thin insulating layer. When cooled below a certain temperature, superconductors allow electrical current to flow without resistance. The junction allows current to flow even when no voltage is applied, a phenomenon known as "tunneling." This unique behavior enables applications in quantum computing, precision measurement, and microwave electronics. The Josephson junction is crucial for creating highly sensitive magnetometers and is a foundational element in the development of powerful quantum bits, or qubits, which are essential for the future of quantum computing.