Understanding the Revised SI: Background, Consequences, and Perspectives. Issue 5 (28th January 2019)

• Record Type: Journal Article
• Authors: Liebisch, Tara Cubel; Stenger, Jörn; Ullrich, Joachim
• Editors: Blaum, Klaus; Budker, Dmitry; Surzhykov, Andrey; Ullrich, Joachim
• Is Part Of: Annalen der Physik. Volume 531:Issue 5(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-01-28
• Subjects: redefinition of the SI -- revised SI; Physics -- Periodicals; Chemistry -- Periodicals; 530.05
• DOI: 10.1002/andp.201800339
• Languages: English
• ISSNs: 0003-3804

Abstract

Abstract: This article expounds the significance of the revision of the international system of units, the SI, approved by the General Conference on Weights and Measures (CGPM) in 2018. The revised SI implements a construct of a system of units based on fixing the numerical values of constants of nature, the "defining constants." This fundamental development in the SI is not only elegant and infinitely sustainable, but moreover will drive future technological innovation. This article provides an historical overview and discusses the underlying principles and consequences of the revised SI: from the history of Planck's proposal for creating a system of units "valid for all times and civilizations, " to the scientific and technological motivations for the revision and the expected resulting innovations. Abstract : Herein, a contemporary perspective and a comprehensive overview of the revised international system of units, the SI, is provided. It spans the historical evolution of the SI with the realization of the units and the innovation spurred by the revision.