Dresden 2026 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 17: Quantum Dots and Wires: Rings, Wires and Transport

HL 17.2: Talk

Tuesday, March 10, 2026, 09:45–10:00, POT/0251

A road to parallelisation - spin qubits as single electron pumps — •Dustin Wittbrodt¹, Johannes Christian Bayer¹, Lars Schreiber², Janne Lehtinen³, and Frank Hohls¹ — ¹Physikalisch-Technische Bundesanstalt, Braunschweig, Germany — ²JARA Institute for Quantum Information, Forschungzentrum Juelich, Germany — ³SemiQon Technologies Oy, Espoo, Finland

The main workhorse of low current Ampere realization is the Single Electron Pump (SEP), which generates quantized currents based on the quantized transport of single charge carriers. The result are currents in the fA-pA range, measureable with a precision of as low as 0.1 ppm. For further improvement of accuracy and current output, parallelization of pumps is the necessary next step. Semiconductor spin qubit devices offer an interesting solution. In addition to sharing the same central building unit, the quantum dots, spin qubits also offer the possibility of incorporating CMOS logic and taking advantage of a mature, high-yield industry for large scale SEP manufacturing, thus allowing for the implementation of a high number of pumps with minimal control inputs. Various Si and Si-compound spin qubit technology platforms are being tested as SEP candidates, within the EU-funded AQuanTEC project. The focus of the activities includes the characterisation of these spin qubits in DC measurements and then in a series of AC measurements to characterise the pumping behaviour of these devices. We present the results of this effort here, offering a perspective on the potential application of Qubit technology for broader use as quantum metrological instruments.

Keywords: single electron pump; quantum dots; electrical quantum metrology; silicon spin qubit devices