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The quantum metrology triangle and the redefinition of the SI ampere and kilogram; analysis of a reduced set of observational equations.

Milton, M J T; Williams, J M; Forbes, A B (2010) The quantum metrology triangle and the redefinition of the SI ampere and kilogram; analysis of a reduced set of observational equations. Metrologia, 47 (3). pp. 279-286.

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Abstract

We have developed a set of seven observational equations that include all of the physics necessary to relate the most important of the fundamental constants to the definitions of the SI kilogram and ampere. We have used these to determine the influence of alternative definitions currently under consideration for the SI kilogram and ampere on the uncertainty of three of the fundamental constants (h, e and mu). We have also reviewed the experimental evidence for the exactness of the quantum metrology triangle resulting from experiments combining the quantum Hall effect, the Josephson effects and single-electron tunnelling.

Item Type: Article
Keywords: SI, fundamental constants
Subjects: Analytical Science
Analytical Science > Gas Standards
Last Modified: 02 Feb 2018 13:15
URI: http://eprintspublications.npl.co.uk/id/eprint/4639

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