The quantum Hall impedance standard

作者：Schurr J^*; Kucera J; Pierz K; Kibble B P

来源：Metrologia, 2011, 48(1): 47-57.

DOI：10.1088/0026-1394/48/1/005

Alternating current measurements of double-shielded quantum Hall devices have revealed a fascinating property of which only a quantum effect is capable: it can detect its own frequency dependence and convert it to a current dependence which can be used to eliminate both of them. According to an experimentally verified model, the residual frequency dependence is smaller than the measuring uncertainty of 1.3 x 10(-9) kHz(-1). In this way, a highly precise quantum standard of impedance can be established, without having to correct for any calculated frequency dependence and without the need for any artefact with a calculated frequency dependence. Nothing else like that is known to us and we hope that our results encourage other national metrology institutes to also apply it to impedance metrology and further explore its beautiful properties.

• 出版日期2011