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Superconductive Electronics Group

Exploits the quantum behavior of superconducting Josephson junctions and materials to develop novel superconducting electronic devices, circuits, systems, and precision measurement techniques for state-of-the-art electrical measurements.

The Superconductive Electronics Group utilizes the quantum effects of Josephson junctions in specialized superconducting integrated circuits to improve measurement technology and standards for fundamental metrology, such as for dc and ac voltage, waveform synthesis, and primary thermometry, and for applications that require high-performance, such as energy-efficient advanced computing and RF communications. The Quantum Voltage and Noise Thermometry Projects develop and disseminate standard reference instruments and measurement best practices for dc and ac voltage metrology, RF metrology and primary thermometry. The Flux Quantum Electronics Project develops cryogenic superconductive circuits and measurement techniques for advanced, energy-efficient computing, RF communications, and electrical metrology.

Voltage Metrology with Superconductive Electronics

Voltage Metrology with Superconductive Electronics presentation

Presenter: Sam Benz
Fundamental standards for voltage, dc and ac, are based on the Josephson Effect. In this talk from the Applied Superconductivity Conference 2016, Sam Benz discusses the development, state-of-the-art, and future prospects for these standards.

PDF Files: Abstract | Annotated slides

News and Updates

Uncrunching the Frequency Spectrum

The squeeze is here, and the crunch is coming. Soon. Explosive demand for high-speed wireless communication is placing growing pressure on the limited frequency

Noise, Temperature, and the New SI

NIST has recently made substantial improvements to its Johnson-noise thermometry system, which is playing a vital role in the worldwide effort to determine the

Projects and Programs

Flux Quantum Electronics

NIST researchers in the Flux Quantum Electronics (FQE) project develop cryogenic superconductive circuits and measurement techniques for advanced, energy

Noise Thermometry

The Noise Thermometry Project is applying quantum-based voltage waveform synthesis to a precision measurement of Boltzmann's constant kB by developing a primary

Quantum Voltage Project

Developing Josephson Voltage Standard systems in order to improve the accuracy of both ac and dc voltage measurements. Both liquid-helium based systems and


A Cryogenic Quantum-Based RF Source

Justus A. Brevik, Christine A. Donnelly, Nathan E. Flowers-Jacobs, Anna E. Fox, Peter F. Hopkins, Paul D. Dresselhaus, Dylan F. Williams, Samuel P. Benz, Manuel C. Castellanos Beltran, A. Soares Boaventura
We performed a preliminary calibrated measurement of the output power of a Josephson arbitrary waveform synthesizer up to 1 GHz. We present the results and

Josephson Junctions for Metrology Applications

Samuel P. Benz
The Josephson effect has revolutionized voltage metrology [1-5] and, together with the quantum Hall effect for resistance and atomic clocks for time and

1 GHz Waveform Synthesis With Josephson Junction Arrays

Christine A. Donnelly, Nathan E. Flowers-Jacobs, Justus A. Brevik, Anna E. Fox, Paul D. Dresselhaus, Peter F. Hopkins, Samuel P. Benz
We synthesize single- and multiple-tone waveforms at gigahertz frequencies from arrays of Josephson junctions and demonstrate their quantum-locked operation

Pulse-Driven High-Tc Josephson Junctions for Quantum Voltage Devices

Adam C. Weis, Nathan E. Flowers-Jacobs, E Y. Choi, H Li, J C. LeFebvre, Shane Cybart, Stuart Berkowitz, Horst Rogalla, Samuel P. Benz
Josephson junction arrays are the basis for quantum-accurate dc and ac voltage standards, including artificial voltage-noise references used in noise


2008 APS Fellow - Samuel Benz

The criterion for election is exceptional contributions to the physics enterprise; e.g., outstanding physics research, important...

2004 APS Fellow - Robert Schwall

The criterion for election is exceptional contributions to the physics enterprise; e.g., outstanding physics research, important...


Group Leader

Project Leaders