%0 Journal Article
%T Quantum metrological triangle experiment at LNE: measurements on a three-junction R-pump using a 20 000:1 winding ratio cryogenic current comparator
%+ Laboratoire commun de métrologie LNE-CNAM (LCM)
%+ Laboratoire Charles Coulomb (L2C)
%A Devoille, Laurent
%A Feltin, N.
%A Steck, B.
%A Chenaud, Boris
%A Sassine, S.
%A Djordevic, S.
%A Seron, O.
%A Piquemal, François
%< avec comité de lecture
%Z L2C:12-263
%@ 0957-0233
%J Measurement Science and Technology
%I IOP Publishing
%V 23
%N 12
%P 124011
%8 2012-12
%D 2012
%R 10.1088/0957-0233/23/12/124011
%K quantum electrical metrology
%K quantum metrological triangle
%K single-electron tunnelling device
%K cryogenic current comparator
%Z 06.20.Jr Determination of fundamental constants , 73.43.Fj Novel experimental methods; measurements, 06.20.fb Standards and calibration, 03.65.Ta Foundations of quantum mechanics; measurement theory, 06.20.fa Units
%Z Physics [physics]/Quantum Physics [quant-ph]
%Z Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]Journal articles
%X The direct closure of the quantum metrological triangle consists in achieving Ohm's law with the three effects used and investigated in quantum electrical metrology: the Josephson effect (JE), the quantum Hall effect (QHE) and the single-electron tunnelling effect (SET). The aim is to check the consistency of the phenomenological constants KJ, RK and QX associated with these effects and theoretically expressed with the fundamental constants e and h (elementary charge and Planck constant, respectively). Such an experiment is a contribution to a future redefinition of the International System of units (SI). In this paper, the experimental setup developed at LNE is described and the main obtained results are given. From a set of four measurements, agreement at a level of 1.3 parts in 105 was found between the quantum charge involved in the SET, i.e. QX, and the CODATA value of the elementary charge. The best measurement has shown a relative type-A uncertainty of 1.9 parts in 106, while the amplitude of the current generated by a metallic electron pump was as low as 3.6 pA.
%G English
%L hal-00789063
%U https://hal.science/hal-00789063
%~ CNRS
%~ CNAM
%~ L2C
%~ LNE
%~ MIPS
%~ UNIV-MONTPELLIER
%~ LNE-CNAM
%~ UM-2015-2021
%~ TEST3-HALCNRS
%~ HESAM-CNAM
%~ HESAM