Compendium for precise ac measurements of the quantum Hall resistance

• Published in: Metrologia Vol. 46; no. 5; pp. R1 - R11
• Main Authors: Ahlers, F J, Jeanneret, B, Overney, F, Schurr, J, Wood, B M
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.10.2009
• Subjects: Accuracy; Electric currents; Electric resistance; Measurement techniques; Quantum theory
• ISSN: 0026-1394; 1681-7575
• DOI: 10.1088/0026-1394/46/5/R01

In view of the progress achieved in the field of the alternating current (ac) quantum Hall effect (QHE), the Working Group of the Comite Consultatif d'Electricite et Magnetisme (CCEM) on the ac QHE asked the authors of this article to write a compendium which integrates their experiences with ac measurements of the quantum Hall resistance. In addition to the important early work performed at the Bureau International des Poids et Mesures and the National Physical Laboratory, UK, further experience has been gained during a collaboration of the authors' institutes NRC, METAS and PTB, and excellent agreement between the results of different national metrology institutes has been achieved. This compendium summarizes the present state of the authors' knowledge and reviews the experiences, tests and precautions that the authors have employed to achieve accurate measurements of the ac QHE. This work shows how the ac QHE can be reliably used as a quantum standard of ac resistance having a relative uncertainty of a few parts in 10^8. [PUBLICATION ABSTRACT]