Print Email Facebook Twitter Electrical Control of Uniformity in Quantum Dot Devices Title Electrical Control of Uniformity in Quantum Dot Devices Author Meyer, M. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Déprez, C.C. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) van Abswoude, Timo R. (Kavli institute of nanoscience Delft; Student TU Delft) Meijer, Ilja N. (Kavli institute of nanoscience Delft; Student TU Delft) Liu, Dingshan (Kavli institute of nanoscience Delft; Student TU Delft) Wang, C.A. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Karwal, S. (TU Delft BUS/TNO STAFF; TU Delft QuTech Advanced Research Centre) Oosterhout, S.D. (TU Delft BUS/TNO STAFF) Borsoi, F. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Sammak, A. (TU Delft BUS/TNO STAFF; TU Delft QuTech Advanced Research Centre) Hendrickx, N.W. (TU Delft QCD/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Scappucci, G. (TU Delft QCD/Scappucci Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Veldhorst, M. (TU Delft QN/Veldhorst Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Date 2023 Abstract Highly uniform quantum systems are essential for the practical implementation of scalable quantum processors. While quantum dot spin qubits based on semiconductor technology are a promising platform for large-scale quantum computing, their small size makes them particularly sensitive to their local environment. Here, we present a method to electrically obtain a high degree of uniformity in the intrinsic potential landscape using hysteretic shifts of the gate voltage characteristics. We demonstrate the tuning of pinch-off voltages in quantum dot devices over hundreds of millivolts that then remain stable at least for hours. Applying our method, we homogenize the pinch-off voltages of the plunger gates in a linear array for four quantum dots, reducing the spread in pinch-off voltages by one order of magnitude. This work provides a new tool for the tuning of quantum dot devices and offers new perspectives for the implementation of scalable spin qubit arrays. Subject hysteresisquantum dotspin qubituniformity To reference this document use: http://resolver.tudelft.nl/uuid:f52a6d49-e458-47c6-b1d0-13001deb07f7 DOI https://doi.org/10.1021/acs.nanolett.2c04446 ISSN 1530-6984 Source Nano Letters: a journal dedicated to nanoscience and nanotechnology, 23 (7), 2522-2529 Part of collection Institutional Repository Document type journal article Rights © 2023 M. Meyer, C.C. Déprez, Timo R. van Abswoude, Ilja N. Meijer, Dingshan Liu, C.A. Wang, S. Karwal, S.D. Oosterhout, F. Borsoi, A. Sammak, N.W. Hendrickx, G. Scappucci, M. Veldhorst Files PDF acs.nanolett.2c04446.pdf 3.28 MB Close viewer /islandora/object/uuid:f52a6d49-e458-47c6-b1d0-13001deb07f7/datastream/OBJ/view