Quantum 2025 – wissenschaftliches Programm
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MON: Monday Contributed Sessions
MON 22: Quantum Transport II
MON 22.3: Vortrag
Montag, 8. September 2025, 17:00–17:15, ZHG104
Quantum electrical current sources for metrological application based on silicon qubit technology — •Dustin Wittbrodt1, Johannes C. Bayer1, Janne S. Lehtinen2, Lars R. Schreiber3, Marcelo Jaime1, and Frank Hohls1 — 1Physikalisch-Technische Bundesanstalt, Braunschweig, Deutschland — 2SemiQon Technologies Oy, Espoo, Finnland — 33JARA Institute for Quantum Information, Forschungszentrum Juelich,Juelich, Germany
In 2019, the redefinition of the SI system of units introduced fixed values to fundamental constants such as the elementary charge (e) and the Planck constant (h). While the units Ohm and Volt are well established, the ampere has yet to reach the same level of accuracy. The most commonly used concept of Ampere realization has been the Single Electron Pumps (SEPs), which generate quantized currents in the fA-pA range with a precision of as low as 0.2 ppm. To increase the current level of such single electron-based quantum current standards into the nA range, parallelization of several SEPs is required. To explore this task a high level of reproducibility and scalability is necessary, which is available in industrial CMOS processes. As part of the EU-funded AQuanTEC project, different Si and Si-Compound Spin Qubit Technology platforms are being tested as SEPs focusing on their accuracy and pumping behavior. To benchmark their accuracy, AC modulated pumping experiments are conducted. The results of this effort are presented here, offering a perspective into the possible employment of Qubit technology for the broader usage as quantum metrological instruments.
Keywords: single electron pump; quantum dots; electrical quantum metrology; silicon spin qubit devices