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NBS to base legal volt on the Josephson effect

OCT 01, 1972

DOI: 10.1063/1.3071043

Physics Today

The National Bureau of Standards has adopted a new procedure for maintaining the US legal volt based on the determination of the ratio of $2e/h$ using the ac Josephson effect. Recent work at the University of Pennsylvania and NBS has shown that $2e/h$ can be determined in terms of a particular unit of voltage to 1 part in 10 million or better.

© 1972. American Institute of Physics

This Content Appeared In

Volume 25, Number 10

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