Current Mirror Effect and Correlated Cooper-Pair Transport in Coupled Arrays of Small Josephson Junctions

H. Shimada; P. Delsing

doi:10.1103/PhysRevLett.85.3253

Current Mirror Effect and Correlated Cooper-Pair Transport in Coupled Arrays of Small Josephson Junctions

H. Shimada and P. Delsing

Phys. Rev. Lett. 85, 3253 – Published 9 October 2000

Abstract

We have measured the transport properties of capacitively coupled one-dimensional arrays of small aluminum Josephson junctions. Under suitable biasing conditions, the samples act as current mirrors; the currents in the two arrays couple to each other and become equally large. The coupling is found both for currents flowing in the same direction and in opposite directions. We have also measured the time dependent fluctuations of the currents in the two arrays, and we find a strong correlation or anticorrelation of the fluctuations depending on the relative direction of the two currents.

Received 28 December 1999

DOI:https://doi.org/10.1103/PhysRevLett.85.3253

Authors & Affiliations

H. Shimada^1,2 and P. Delsing¹

¹Microtechnology Center at Chalmers MC2, Department of Microelectronics and Nanoscience, Chalmers University of Technology and Göteborg University, S-412 96, Göteborg, Sweden
²Cryogenic Center, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan