Using a High-Value Resistor in Triangle Comparisons of Electrical Standards

Published

June 1, 2002

Author(s)

Randolph Elmquist, Neil M. Zimmerman, William Huber

Abstract

We propose an experiment with some advantages over other direct quantum metrology triangle comparisons. First, by using a cryogenic resistor that can be calibrated, the QHR standard needs to be used only for short periods. Second, the experiment does not require a voltage detector. This eliminates one external source of noise and allows fast current reversals. Third, feedback that might contribute to excess noise and SQUID flux-jump behavior is also absent in the primary comparison system. This experiment could be run at higher currents and without supervision for extended periods of time, to benefit from statistical reduction of noise. We have developed a cryogenic current comparator for calibrating the cryogenic resistor directly against the QHR.

Citation

IEEE Transactions on Instrumentation and Measurement

Pub Type

Journals

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Keywords

Fundamental Constants , Quantum Hall Effect, Resistance Standards, Josephson Effect

Citation

Elmquist, R. , Zimmerman, N. and Huber, W. (2002), Using a High-Value Resistor in Triangle Comparisons of Electrical Standards, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30082 (Accessed October 8, 2025)