• Corpus ID: 53124092

A Review on Quantum Metrology Triangle Experiments

@inproceedings{Scherer2013ARO,
  title={A Review on Quantum Metrology Triangle Experiments},
  author={Hansj{\"o}rg Scherer and B. Camarota and Physikalisch-Technische Bundesanstalt Braunschweig},
  year={2013},
  url={https://api.semanticscholar.org/CorpusID:53124092}
}

• H. Scherer, B. Camarota, P. T. Braunschweig
• Published 2013
• Physics, Engineering

Quantum Metrology Triangle experiments combine the three quantum electrical effects that are relevant in metrology, and thus enable a fundamental consistency test on the validity of commonly assumed relations between fundamental constants of nature and the quantum electrical effects. This paper reviews the history, results and the present status of Quantum Metrology Triangle experiments and their perspectives. Possible implications for the knowledge on fundamental constants and the quantum… 

Quantum Metrology Triangle experiments combine the three quantum electrical effects that are relevant in metrology, and thus enable a fundamental consistency test on the validity of commonly assumed relations between fundamental constants of nature and the quantum electrical effects. This paper reviews the history, results and the present status of Quantum Metrology Triangle experiments and their perspectives. Possible implications for the knowledge on fundamental constants and the quantum electrical effects are discussed. The modern SI, based on seven base units, up to now has been very successful in ensuring worldwide consistency and uniformity of measurements. However, with scientific progress over the past decades, certain disadvantages are now apparent, in particular in the definition of the kilogram as the unit of mass, but also in the definition of the electrical base unit ampere. The impending revision of the International System of units (SI) presents fundamental metrology with the most profound paradigm changes since the implementation of the SI in 1960 (1, 2). In the present SI, the kilogram is the last base unit still being based on a manufactured object. Like any artefact, this metallic kilogram body is susceptible to changes over time. The electrical base unit within the SI, the ampere, is presently still defined in terms of mechanical units of mass, length and time via the laws of classical electromagnetism. This is to be improved for two main reasons: firstly, the SI ampere is vulnerable to drift and instability from the kilogram artefact, and secondly, the electro-mechanical experiments needed to realise the SI electrical units are extremely difficult and require decades of effort. Moreover, under its present definition the ampere cannot be realised with accuracy better than a few parts in 10 7 . This is not sufficient to meet the accuracy needs of routine electrical metrology, which requires one part 10 7 now and will require even better in the future.