2015/06/19 by Friederike Stein, Dietmar Drung, Lukas Fricke +12 · 1 citation
Engineering · Physics and Astronomy · #Advanced Electrical Measurement Techniques #Ampere #Atomic and Subatomic Physics Research #Charge (physics) #Current (fluid) #Measurement uncertainty #Quantization (signal processing) #Quantum #Quantum Hall effect #Quantum and electron transport phenomena #Realization (probability) #Standard uncertainty #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.4930142
published as Appl. Phys. Lett. 107, 103501 (2015)
arxiv created 2015/06/19 · openalex publication_date 2015/09/07 · arxiv updated 2015/09/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.