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Meyer, M. (author), Déprez, C. (author), van Abswoude, T.R. (author), Meijer, I.N. (author), Liu, D. (author), Wang, C.A. (author), Karwal, S. (author), Oosterhout, S.D. (author), Borsoi, F. (author), Sammak, A. (author), Hendrickx, N.W. (author), Scappucci, G. (author), Veldhorst, M. (author)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...article 2023
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Mazur, G.P. (author), van Loo, N. (author), Wang, J.Y. (author), Dvir, T. (author), Wang, G. (author), Khindanov, A. (author), Korneychuk, S. (author), Borsoi, F. (author), Dekker, R.C. (author), Badawy, G. (author), Vinke, P. (author), Gazibegovic, S. (author), Bakkers, E.P.A.M. (author), Quintero-Pérez, M. (author), Heedt, S. (author), Kouwenhoven, L.P. (author)In superconducting quantum circuits, aluminum is one of the most widely used materials. It is currently also the superconductor of choice for the development of topological qubits. However, aluminum-based devices suffer from poor magnetic field compatibility. Herein, this limitation is resolved by showing that adatoms of heavy elements (e.g.,...article 2022
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Heedt, S. (author), Borsoi, F. (author), Fursina, A. (author), van Loo, N. (author), Mazur, G.P. (author), Nowak, M.P. (author), Ammerlaan, M. (author), Li, K. (author), Korneychuk, S. (author), Shen, J. (author), van de Poll, M.A.Y. (author), Badawy, G. (author), Gazibegovic, S. (author), de Jong, N. (author), Aseev, P. (author), van Hoogdalem, K. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, L.P. (author)The realization of hybrid superconductor–semiconductor quantum devices, in particular a topological qubit, calls for advanced techniques to readily and reproducibly engineer induced superconductivity in semiconductor nanowires. Here, we introduce an on-chip fabrication paradigm based on shadow walls that offers substantial advances in device...article 2021
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Aseev, P. (author), Fursina, A. (author), Boekhout, F. (author), Krizek, F. (author), Sestoft, J.E. (author), Borsoi, F. (author), Heedt, S. (author), Wang, G. (author), Binci, L. (author), Martí-Sánchez, S. (author), Swoboda, T. (author), Koops, R. (author), Uccelli, E. (author), Arbiol, J. (author), Krogstrup, P. (author), Kouwenhoven, L.P. (author), Caroff, P. (author)Selective-area growth is a promising technique for enabling of the fabrication of the scalable III-V nanowire networks required to test proposals for Majorana-based quantum computing devices. However, the contours of the growth parameter window resulting in selective growth remain undefined. Herein, we present a set of experimental techniques...article 2019
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Kroll, J.G. (author), Borsoi, F. (author), van der Enden, K.L. (author), Uilhoorn, W. (author), de Jong, D. (author), Quintero-Perez, M. (author), van Woerkom, D.J. (author), Bruno, A. (author), Plissard, S.R. (author), Car, D. (author), Bakkers, E.P.A.M. (author), Cassidy, M.C. (author), Kouwenhoven, L.P. (author)Superconducting coplanar-waveguide resonators that can operate in strong magnetic fields are important tools for a variety of high-frequency superconducting devices. Magnetic fields degrade resonator performance by creating Abrikosov vortices that cause resistive losses and frequency fluctuations or suppress the superconductivity entirely. To...article 2019