The Josephson phase is the difference of the phases of the quantum mechanical wave function in two superconducting electrodes forming a Josephson junction. The Josephson effect is an example of a macroscopic quantum phenomenon. If the macroscopic wave functions and in superconductors 1 and 2 are given by. Imagine that initially at time the junction was in the ground state and finally at time the junction has the phase. The basic equations governing the dynamics of the Josephson effect are . The weak link can consist of a thin insulating barrier known as a superconductor—insulator—superconductor junction , or S-I-S , a short section of non-superconducting metal S-N-S , or a physical constriction that weakens the superconductivity at the point of contact S-s-S.
Josephson penetration depth | Article about Josephson penetration depth by The Free Dictionary
The critical current is an important phenomenological parameter of the device that can be affected by temperature as well as by an applied magnetic field. The Josephson phase is the difference of the phases of the quantum mechanical wave function in two superconducting electrodes forming a Josephson junction. A "Dayem bridge" is a thin-film variant of the Josephson junction in which the weak link consists of a superconducting wire with dimensions on the scale of a few micrometres or less. It is named after the British physicist Brian David Josephson , who predicted in the mathematical relationships for the current and voltage across the weak link.
Josephson penetration depth
Description: Note, that although Josephson junction behaves like an inductance, there is no associated magnetic field. For this work, Josephson received the Nobel Prize in Physics in Hence, for distinct AC voltages, the junction may carry a DC current and the junction acts like a perfect frequency-to-voltage converter. Josephson effect Josephson junction array chip developed by the National Bureau of Standards as a standard volt. For the simplest case the current-phase relation CPR is given by aka the first Josephson relation:.