Coherent characteristics of superconducting closed loop composed of Josephson junctions
Abstract
It is noted that the elements are connected in series when the impedance of a Josephson junction is too low. Two arrays, each having N series elements of Josephson junctions, are connected, and the conditions under which operation is coherent are determined by an investigation of voltage-current curves. Computer simulation reveals that coherent operation is easier with this circuit than with a series connection of the elements when the elements have different junction parameters. Pb-alloy tunnel-type junctions are produced which have N = 2 and 3, and it is found that voltage steps generated by applying rf current with frequency F have a voltage interval corresponding to NF. This is in agreement with the simulation results and suggests coherent operation.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- September 1983
- Bibcode:
- 1983JElCo..66..107K
- Keywords:
-
- Computerized Simulation;
- Equivalent Circuits;
- Josephson Junctions;
- Superconductors;
- Volt-Ampere Characteristics;
- Coherent Radiation;
- Electron Tunneling;
- Frequency Response;
- Lead Alloys;
- Performance Prediction;
- Radio Signals;
- Silicon Junctions;
- Electronics and Electrical Engineering