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John, V. (author), Borsoi, F. (author), György, Zoltán (author), Wang, C.A. (author), Széchenyi, Gábor (author), van Riggelen, F. (author), Lawrie, W.I.L. (author), Hendrickx, N.W. (author), Sammak, A. (author), Scappucci, G. (author), Pályi, András (author), Veldhorst, M. (author)Electrically driven spin resonance is a powerful technique for controlling semiconductor spin qubits. However, it faces challenges in qubit addressability and off-resonance driving in larger systems. We demonstrate coherent bichromatic Rabi control of quantum dot hole spin qubits, offering a spatially selective approach for large qubit arrays...journal article 2024
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Corley-Wiciak, Cedric (author), Richter, Carsten (author), Zoellner, Marvin H. (author), Zaitsev, Ignatii (author), Manganelli, Costanza L. (author), Hendrickx, N.W. (author), Sammak, A. (author), Veldhorst, M. (author), Scappucci, G. (author)A strained Ge quantum well, grown on a SiGe/Si virtual substrate and hosting two electrostatically defined hole spin qubits, is nondestructively investigated by synchrotron-based scanning X-ray diffraction microscopy to determine all its Bravais lattice parameters. This allows rendering the three-dimensional spatial dependence of the six...journal article 2023
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Meyer, M. (author), Déprez, C.C. (author), van Abswoude, Timo R. (author), Meijer, Ilja N. (author), Liu, Dingshan (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...journal article 2023
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Hendrickx, G.G. (author), Antolínez, José A. Á. (author), Herman, P.M.J. (author)In recent years, coastal management has been facing new challenges: socio-economic growth and consequent climate change impose new boundary conditions pushing coastal systems towards unseen states. For adaptation and mitigation strategies as well as risk management, the resilience of systems to these projected changes must be tested and...journal article 2023
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Hendrickx, G.G. (author), Antolínez, José A. Á. (author), Herman, P.M.J. (author), Aarninkhof, S.G.J. (author)All around the world, deltas are among the most densely populated and heavily utilised regions, where crucial functions, such as freshwater availability and safety against flooding, strongly relate to the natural dynamics of the system. Therefore, a thorough understanding of the estuarine system is crucial, especially when developing nature...conference paper 2023
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Sarkar, Abhikbrata (author), Wang, Zhanning (author), Rendell, Matthew (author), Hendrickx, N.W. (author), Veldhorst, M. (author), Scappucci, G. (author), Khalifa, Mohammad (author), Salfi, Joe (author), Saraiva, Andre (author)Hole spin qubits in group-IV semiconductors, especially Ge and Si, are actively investigated as platforms for ultrafast electrical spin manipulation thanks to their strong spin-orbit coupling. Nevertheless, the theoretical understanding of spin dynamics in these systems is in the early stages of development, particularly for in-plane magnetic...journal article 2023
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Hendrickx, G.G. (author), Kranenburg, W.M. (author), Antolínez, José A. Á. (author), Huismans, Y. (author), Aarninkhof, S.G.J. (author), Herman, P.M.J. (author)Estuaries are among the most densely populated and heavily utilised regions in the world, where crucial functions – e.g., freshwater availability and water safety – strongly relate to the natural dynamics of the system. When developing nature-based solutions to safeguard these essential functions, a thorough understanding of estuarine...journal article 2023
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Lawrie, W.I.L. (author), Russ, M.F. (author), van Riggelen, F. (author), Hendrickx, N.W. (author), de Snoo, S.L. (author), Sammak, A. (author), Scappucci, G. (author), Helsen, J. (author), Veldhorst, M. (author)Practical Quantum computing hinges on the ability to control large numbers of qubits with high fidelity. Quantum dots define a promising platform due to their compatibility with semiconductor manufacturing. Moreover, high-fidelity operations above 99.9% have been realized with individual qubits, though their performance has been limited to 98...journal article 2023
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Wang, C.A. (author), Déprez, C.C. (author), Tidjani, H. (author), Lawrie, W.I.L. (author), Hendrickx, N.W. (author), Sammak, A. (author), Scappucci, G. (author), Veldhorst, M. (author)Simulations using highly tunable quantum systems may enable investigations of condensed matter systems beyond the capabilities of classical computers. Quantum dots and donors in semiconductor technology define a natural approach to implement quantum simulation. Several material platforms have been used to study interacting charge states,...journal article 2023
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Borsoi, F. (author), Hendrickx, N.W. (author), John, V. (author), Meyer, M. (author), Motz, Sayr (author), van Riggelen, F. (author), Sammak, A. (author), de Snoo, S.L. (author), Scappucci, G. (author), Veldhorst, M. (author)The efficient control of a large number of qubits is one of the most challenging aspects for practical quantum computing. Current approaches in solid-state quantum technology are based on brute-force methods, where each and every qubit requires at least one unique control line—an approach that will become unsustainable when scaling to the...journal article 2023
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van Riggelen, F. (author), Lawrie, W.I.L. (author), Russ, M.F. (author), Hendrickx, N.W. (author), Sammak, A. (author), Rispler, M.R.R. (author), Terhal, B.M. (author), Scappucci, G. (author), Veldhorst, M. (author)The fault-tolerant operation of logical qubits is an important requirement for realizing a universal quantum computer. Spin qubits based on quantum dots have great potential to be scaled to large numbers because of their compatibility with standard semiconductor manufacturing. Here, we show that a quantum error correction code can be...journal article 2022
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Hendrickx, N.W. (author)Spin quantum bits (qubits) defined in semiconductor quantum dots have emerged as a promising platform for quantum information processing. Various semiconductor materials have been studied as a host for the spin qubit. Over the last decade, research focussed on the group‐IV semiconductor silicon, owing to its compatibility with semiconductor...doctoral thesis 2021
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Lodari, M. (author), Hendrickx, N.W. (author), Lawrie, W.I.L. (author), Hsiao, T. (author), Vandersypen, L.M.K. (author), Sammak, A. (author), Veldhorst, M. (author), Scappucci, G. (author)We engineer planar Ge/SiGe heterostructures for low disorder and quiet hole quantum dot operation by positioning the strained Ge channel 55 nm below the semiconductor/dielectric interface. In heterostructure field effect transistors, we measure a percolation density for two-dimensional hole transport of 2.1 × 10 10 cm−2 , indicative of a very...journal article 2021
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van Riggelen, F. (author), Hendrickx, N.W. (author), Lawrie, W.I.L. (author), Russ, M.F. (author), Sammak, A. (author), Scappucci, G. (author), Veldhorst, M. (author)Quantum dots fabricated using methods compatible with semiconductor manufacturing are promising for quantum information processing. In order to fully utilize the potential of this platform, scaling quantum dot arrays along two dimensions is a key step. Here, we demonstrate a two-dimensional quantum dot array where each quantum dot is tuned to...journal article 2021
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Rossi, Alessandro (author), Hendrickx, N.W. (author), Sammak, A. (author), Veldhorst, M. (author), Scappucci, G. (author), Kataoka, Masaya (author)Single-charge pumps are the main candidates for quantum-based standards of the unit ampere because they can generate accurate and quantized electric currents. In order to approach the metrological requirements in terms of both accuracy and speed of operation, in the past decade there has been a focus on semiconductor-based devices. The use of...journal article 2021
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Hendrickx, G.G. (author), Herman, P.M.J. (author), Dijkstra, Jasper T. (author), Storlazzi, Curt D. (author), Toth, Lauren T. (author)The increasing pressure on Earth's ecosystems due to climate change is becoming more and more evident and the impacts of climate change are especially visible on coral reefs. Understanding how climate change interacts with the physical environment of reefs to impact coral growth and reef development is critically important to predicting the...journal article 2021
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Hendrickx, Rik (author), Zoutendijk, M. (author), Mitici, M.A. (author), Schäfer, Jeffrey (author)A key part of efficient airport operational planning is to have insight into potential flight delays and cancellations. For airport planners, it is important to obtain flight delay or cancellation predictions with a high degree of certainty, i.e. a high precision. This allows planners to make sound decisions based on these predictions. To obtain...conference paper 2021
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Hendrickx, Rik (author)As on-time performance is one of the main contributors to success in the world of commercial aviation, predictions on flight delays and cancellations can significantly improve operational efficiency and thus quality of service. Since flight delays and cancellations are occasional and infrequent events, operational on-time performance data is...master thesis 2020
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Hendrickx, Gijs (author)KEY POINTS (I) A biophysical model framework (BMF) for corals is developed in which four environmental factors are included: (1) light; (2) hydrodynamics; (3) temperature; and (4) acidity. (II) The full feedback loop between corals and their environment forms the core of this model framework, where the morphological...master thesis 2020
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Lawrie, W.I.L. (author), Eenink, H.G.J. (author), Hendrickx, N.W. (author), Boter, J.M. (author), Petit, L. (author), Amitonov, S. (author), Lodari, M. (author), Paquelet Wuetz, B. (author), Volk, C.A. (author), Philips, S.G.J. (author), Droulers, G. (author), Kalhor, N. (author), van Riggelen, F. (author), Brousse, D. (author), Sammak, A. (author), Vandersypen, L.M.K. (author), Scappucci, G. (author), Veldhorst, M. (author)Electrons and holes confined in quantum dots define excellent building blocks for quantum emergence, simulation, and computation. Silicon and germanium are compatible with standard semiconductor manufacturing and contain stable isotopes with zero nuclear spin, thereby serving as excellent hosts for spins with long quantum coherence. Here, we...review 2020