Validation of a quantized-current source with 0.2 ppm uncertainty

Journal Article · Mon Sep 07 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4930142· OSTI ID:22482055

Stein, Friederike; Fricke, Lukas; Scherer, Hansjörg; Hohls, Frank; Leicht, Christoph; Götz, Martin; Krause, Christian; Behr, Ralf; Pesel, Eckart; Pierz, Klaus; Siegner, Uwe; Ahlers, Franz J.; Schumacher, Hans W. ^[1]; Drung, Dietmar ^[2]

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1. Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig (Germany)
2. Physikalisch-Technische Bundesanstalt (PTB), Abbestrasse 2-12, 10587 Berlin (Germany)

We report on high-accuracy measurements of quantized current, sourced by a tunable-barrier single-electron pump at frequencies f up to 1 GHz. The measurements were performed with an ultrastable picoammeter instrument, traceable to the Josephson and quantum Hall effects. Current quantization according to I = ef with e being the elementary charge was confirmed at f = 545 MHz with a total relative uncertainty of 0.2 ppm, improving the state of the art by about a factor of 5. The accuracy of a possible future quantum current standard based on single-electron transport was experimentally validated to be better than the best (indirect) realization of the ampere within the present SI.

• OSTI ID: 22482055
• Journal Information: Applied Physics Letters, Vol. 107, Issue 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
CURRENTS
ELECTRONS
GHZ RANGE 01-100
MHZ RANGE 100-1000
QUANTIZATION
VALIDATION