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Metrology and Measurement Systems

The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences

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Volume 17, Issue 2

Issues

The Quantum SI - Towards the New Systems of Units

Waldemar Nawrocki
  • Faculty of Electronics and Telecommunications, Poznan University of Technology, Polanka 3, 60-965 Poznan, Poland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2010-11-01 | DOI: https://doi.org/10.2478/v10178-010-0013-9

The Quantum SI - Towards the New Systems of Units

The possibility or even necessity of revising definitions of some of the base units of the present SI has been discussed over the past 15 years. The last General Conference of Weights and Measures (2007) recommended to redefine the kilogram, the ampere, the kelvin, and the mole using fixed values of the fundamental constants by the time of the next General Conference in 2011. This paper is a review of proposals of new definitions of units of mentioned quantities and arguments voting for particular variants of definitions. Most relevant papers for this review have been published by Metrologia, the international journal appointed at the BIPM, and many other useful pieces of information are available on www pages of the BIPM. The author notes that not only new definitions have been discussed but as well as the set of the base units of the SI. It means a replacement of the ampere by the volt or the kelvin by the joule. Decisions concerning new definitions are not made and the discussions are still open.

Keywords: SI system; base units; quantum standards

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About the article


Published Online: 2010-11-01

Published in Print: 2010-01-01


Citation Information: Metrology and Measurement Systems, Volume 17, Issue 2, Pages 139–150, ISSN (Print) 0860-8229, DOI: https://doi.org/10.2478/v10178-010-0013-9.

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