Tailoring potentials by simulation-aided design of gate layouts for spin qubit applications
Abstract
Gate-layouts of spin qubit devices are commonly adapted from previous successful devices. As qubit numbers and the device complexity increase, modelling new device layouts and optimizing for yield and performance becomes necessary. Simulation tools from advanced semiconductor industry need to be adapted for smaller structure sizes and electron numbers. Here, we present a general approach for electrostatically modelling new spin qubit device layouts, considering gate voltages, heterostructures, reservoirs and an applied source-drain bias. Exemplified by a specific potential, we study the influence of each parameter. We verify our model by indirectly probing the potential landscape of two design implementations through transport measurements. We use the simulations to identify critical design areas and optimize for robustness with regard to influence and resolution limits of the fabrication process.
Authors 12
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information , RWTH Aachen University , 52074 Aachen , Germany
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information , RWTH Aachen University , 52074 Aachen , Germany
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information , RWTH Aachen University , 52074 Aachen , Germany
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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Affiliation as printed
Fakultät für Physik , Universität Regensburg , 93040 Regensburg , Germany
Fakultät für Physik, Universität Regensburg, 93040 Regensburg, Germany
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Affiliation as printed
Fakultät für Physik , Universität Regensburg , 93040 Regensburg , Germany
Fakultät für Physik, Universität Regensburg, 93040 Regensburg, Germany
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Affiliation as printed
Applied Solid State Physics , Ruhr-Universität Bochum , 44801 Bochum , Germany
Applied Solid State Physics, Ruhr-Universität Bochum, 44801 Bochum, Germany
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Affiliation as printed
Applied Solid State Physics , Ruhr-Universität Bochum , 44801 Bochum , Germany
Applied Solid State Physics, Ruhr-Universität Bochum, 44801 Bochum, Germany
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Affiliation as printed
Applied Solid State Physics , Ruhr-Universität Bochum , 44801 Bochum , Germany
Applied Solid State Physics, Ruhr-Universität Bochum, 44801 Bochum, Germany
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Affiliation as printed
Fakultät für Physik , Universität Regensburg , 93040 Regensburg , Germany
Fakultät für Physik, Universität Regensburg, 93040 Regensburg, Germany
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information , RWTH Aachen University , 52074 Aachen , Germany
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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Jülich Aachen Research Alliance · RWTH Aachen University
Affiliation as printed
JARA-FIT Institute for Quantum Information , RWTH Aachen University , 52074 Aachen , Germany
JARA-FIT Institute for Quantum Information, RWTH Aachen University, 52074 Aachen, Germany
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