Mark W Keller 2008 Metrologia 45 102 doi:10.1088/0026-1394/45/1/014
Mark W Keller
Show affiliationsThe quantum metrology triangle is a test of the consistency of three quantum electrical standards: the single-electron tunnelling current standard, the Josephson voltage standard and the quantum Hall resistance standard. This paper considers what is known about each of these effects separately in terms of (1) theory, (2) empirical tests of universality and (3) 'direct' tests involving fundamental constants. The current status of each of the three 'legs' of the triangle is quite different, with the single-electron leg being the weakest by far. This leads to the conclusion that a recent experimental result for the triangle should be interpreted primarily in terms of corrections to the quantum of charge transferred by single-electron devices.
Issue 1 (February 2008)
Received 20 November 2007
Published 18 January 2008
Mark W Keller 2008 Metrologia 45 102
T Pisarkiewicz 1979 J. Phys. E: Sci. Instrum. 12 225
M B Ewing et al 1986 Metrologia 22 93
Francisco M Martinez-Santiesteban et al 2007 Phys. Med. Biol. 52 2073
S. Ghosh et al 2004 Europhys. Lett. 65 678
R Carretero-González et al 2008 Nonlinearity 21 R139
Wang Qiong et al 2008 Chinese Phys. Lett. 25 1313
Yong Jiang et al 2009 J. Phys.: Conf. Ser. 190 012100
J Lowell 1976 J. Phys. D: Appl. Phys. 9 1571
Huang Ping-Hua et al 2002 Chinese Phys. 11 678