Rapid single-flux-quantum circuits for low noise mK operation
Journal article, 2006

Rapid single-flux-quantum (RSFQ) technology has been proposed as control electronics for superconducting quantum bits because of the material and working temperature compatibility. In this work, we consider practical aspects of RSFQ circuit design for low noise low power operation. At the working temperature of 20 mK and operational frequency of 2 GHz, dissipated power per junction is reduced to 25 pW by using 6 νA critical current junctions available at the Hypres and VTT low Jc fabrication process. To limit phonon temperature to 30 mK, a maximum of 40 junctions can be placed on a 5 mm × 5 mm chip. Electron temperature in resistive shunts of Josephson junctions is minimized by use of cooling fins, giving minimum electron temperatures of about 150 mK for the Hypres process and 70 mK for the VTT process.


Samuel Intiso

Chalmers, Microtechnology and Nanoscience (MC2)

J. Pekola

Aalto University

A. Savin

Aalto University

Y. Devyatov

Moscow State University

Anna Kidiyarova-Shevchenko

Chalmers, Microtechnology and Nanoscience (MC2)

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 19 5

Subject Categories

Other Engineering and Technologies

Other Electrical Engineering, Electronic Engineering, Information Engineering



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