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Nonlocal long-range synchronization of planar Josephson junction arrays
- Source :
- Phys. Rev. Applied 17, 064032 (2022)
- Publication Year :
- 2022
-
Abstract
- We study arrays of planar Nb Josephson junctions with contacts to intermediate electrodes, which allow measurements of individual junctions and, thus, provide an insight into intricate array dynamics. We observe a robust phase-locking of arrays, despite a significant inter-junction separation. Several unusual phenomena are reported, such as a bi-stable critical current with re-entrant superconductivity upon switching of nearby junctions; and incorrect Shapiro steps, occurring at mixing frequencies between the external RF radiation and the internal Josephson frequency in nearby junctions. Our results reveal a surprisingly strong and long-range inter-junction interaction. It is attributed to nonlocality of planar junction electrodynamics, caused by the long-range spreading of stray electromagnetic fields. The nonlocality greatly enhances the high-frequency interjunction coupling and enables large-scale synchronization. Therefore, we conclude that planar geometry is advantageous for realization of coherent Josephson electronics.<br />Comment: 8 pages, 5 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 17, 064032 (2022)
- Publication Type :
- Report
- Accession number :
- edsarx.2201.11453
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.17.064032