Realisation of a quantum current standard at liquid helium temperature with sub-ppm reproducibility
| Autor: | Pekka Immonen, Gento Yamahata, Stephen P. Giblin, Akira Fujiwara, Máté Jenei, Antti Kemppinen, Masaya Kataoka, Mikko Möttönen, Antti Manninen, Emma Mykkänen |
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| Přispěvatelé: | National Physical Laboratory, VTT Technical Research Centre of Finland, Centre of Excellence in Quantum Technology, QTF, Nippon Telegraph and Telephone Corporation, Department of Applied Physics, Aalto-yliopisto, Aalto University |
| Rok vydání: | 2019 |
| Předmět: |
Physics - Instrumentation and Detectors
Materials science Silicon chemistry.chemical_element FOS: Physical sciences 02 engineering and technology Electron 01 natural sciences 7. Clean energy Signal law.invention Optics Sine wave law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Reproducibility Condensed Matter - Mesoscale and Nanoscale Physics business.industry Liquid helium General Engineering Instrumentation and Detectors (physics.ins-det) 021001 nanoscience & nanotechnology Magnetic field chemistry quantised charge pumping electron pump Current (fluid) 0210 nano-technology business SI base units |
| Zdroj: | Giblin, S P, Mykkänen, E, Kemppinen, A, Immonen, P, Manninen, A, Jenei, M, Möttönen, M, Yamahata, G, Fujiwara, A & Kataoka, M 2020, ' Realisation of a quantum current standard at liquid helium temperature with sub-ppm reproducibility ', Metrologia, vol. 57, no. 2, 025013 . https://doi.org/10.1088/1681-7575/ab72e0 |
| DOI: | 10.48550/arxiv.1912.02042 |
| Popis: | A silicon electron pump operating at the temperature of liquid helium has demonstrated repeatable operation with sub-ppm accuracy. The pump current, approximately 168 pA, is measured by three laboratories, and the measurements agree with the expected current ef within the uncertainties which range from 0.2 ppm to 1.3 ppm. All the measurements are carried out in zero applied magnetic field, and the pump drive signal is a sine wave. The combination of simple operating conditions with high accuracy demonstrates the possibility that an electron pump can operate as a current standard in a National Measurement Institute. We also discuss other practical aspects of using the electron pump as a current standard, such as testing its robustness to changes in the control parameters, and using a rapid tuning procedure to locate the optimal operation point.. Comment: 7 pages, 5 figures plus an additional 6 pages with 6 figures of supplementary information |
| Databáze: | OpenAIRE |
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