| Zugriffsnummer |
42226 |
| Dokumenttyp |
Zeitschriftenartikel
|
| Peer Review |
ohne Peer Review |
| Sprache |
Englisch
|
| Titel |
Ampere and elementary charge |
| Autor(in); Institution |
Scherer, Hansjörg; 2.6, Elektrische Quantenmetrologie, PTB-Braunschweig
|
| Quelle/Jahr |
Bunsen-Magazin: 21
(2019), 5, 184
- 191
|
| ISSN |
1611-9479
|
| Verlag |
Frankfurt/Main: Deutsche Bunsen-Gesellschaft für Physikalische Chemie
|
| Zusammenfassung |
This article reviews the latest history of the electrical base units of current, the ampere, together with topical developments in the field of modern electrical quantum metrology, including discussion on the consequences of the revision of the International System of Units (Système International d'Unités, SI), which is taking effect in May 2019. One of the main advances of the SI revision for electrical metrology is that the new definition of the ampere decouples the unit from the definition of the unit of mass, formerly being based on an artefact representing the kilogram, which was shown to be instable. Furthermore, the revision solves a dilemma with the realization of the electrical units via quantum electrical effects, which was inherent to the SI since 1990. With the new ampere definition, there is now the possibility of a direct ampere realization by using single-electron transport devices as quantum current sources. |
