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van Riggelen, F. (author)In this thesis, research is presented that explores the characteristics and possibilities of hole spin qubits defined in quantum dots in a germanium/silicon germanium heterostructure. The results of the most important experiments are concerned with distributing quantum information: either by entangling three qubits as the basis for the phase...doctoral thesis 2024
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Meyer, M. (author)The spin of a single electron or hole provides an attractive candidate for implementing a quantum bit when confined in a semiconductor quantum dot. Such a spin qubit is characterized by long coherence and short gate times. High-fidelity single and two-qubit operations have been demonstrated as well. Additionally, semiconductor quantum dots have...doctoral thesis 2024
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Wesdorp, J.J. (author)The growing understanding of the physics of superconductor-semiconductor nanostruc- tures is a key driver for the development of emerging quantum technologies. The elemen- tary excitations of these hybrid nanostructures are Andreev bound states. To further our knowledge about their intricate physics, new tools must be used to study them. This...doctoral thesis 2024
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Franse, W.J.M. (author)The field of quantum acoustics studies high frequency sounds generated at low temperatures such that quantum mechanical effects become relevant. The studies mainly revolves around propagating quantized sound waves, or phonons, a collective excitation of atoms in solids or liquids. In quantum acoustics, the engineering and design tools described...doctoral thesis 2024
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van Nederveen, Milou (author)Quantum Batteries (QBs) are quantum-mechanical devices for energy storage, gaining interest due to a potential quantum advantage in power. Recently, the first experimental implementations of QBs were realised. This study characterises the superconducting transmon qubits of Starmon-5 as QBs using the Quantum Inspire platform. In addition to...master thesis 2024
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Varbanov, B.M. (author)The theory of quantum mechanics describes many phenomena that may initially seem to be counter-intuitive and, in some cases, impossible, given the understanding of classical mechanics that most of us are more intimately familiar with. Following its initial introduction, there was a great deal of debate among scientists regarding the predictions...doctoral thesis 2024
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Gali, Adam (author), Schleife, André (author), Heinrich, Andreas J. (author), Laucht, Arne (author), Schuler, Bruno (author), Chakraborty, Chitraleema (author), Anderson, Christopher P. (author), Déprez, C.C. (author), McCallum, Jeffrey (author)Abstract: Quantum information processing and quantum sensing is a central topic for researchers who are part of the Materials Research Society and the Quantum Staging Group is providing leadership and guidance in this context. We convened a workshop before the 2022 MRS Spring Meeting and covered four topics to explore challenges that need to...review 2024
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Prabowo, B. (author), Dijkema, J.J. (author), Xue, X. (author), Sebastiano, F. (author), Vandersypen, L.M.K. (author), Babaie, M. (author)In semiconductor spin quantum bits (qubits), the radio-frequency (RF) gate-based readout is a promising solution for future large-scale integration, as it allows for a fast, frequency-multiplexed readout architecture, enabling multiple qubits to be read out simultaneously. This article introduces a theoretical framework to evaluate the effect...journal article 2024
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Sagastizabal, R.E. (author)Superconducting qubits have seen a tremendous progress in the last two decades, and yet they remain unable to extract quantum advantage for application scenarios. While algorithms like Shor’s demonstrate quantum advantage in theory, they do not seem to fit modern noisy quantum processors. Then, in order to achieve quantum advantage either modern...doctoral thesis 2023
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Costantini, Andrea (author)The concept of quantum computing is gaining increasing popularity in the last years due to its potential for running certain classes of algorithms much more efficiently than classical computation. These algorithms span from simulation of quantum mechanical effects to factorization of large number, from simulation of molecules for drug discovery...master thesis 2023
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Polat, Ilker (author)<br/>As the number of qubits increases, controlling qubits at cryogenic temperatures with electronics at room temperature becomes infeasible due to the vast number of cabling. This necessitates controlling quantum operations on the qubits with a cryogenic interface, which is low power, scalable and maintains qubit fidelity.<br/><br/>In pursuit...master thesis 2023
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Szkudlarek, Sacha (author)This thesis presents a novel formulation to study the qubit-mapping problem (QMP). The presented for- mulation redefines the problem in terms of density matrices which represent the quantum algorithm and the underlying architecture—allowing the implementation of techniques from quantum information theory to es- tablish a bounded metric space for...master thesis 2023
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Arumugam, AMIRTHA VARSHINY (author)Input qubit control signals from an arbitrary waveform generator (AWG) operating at room temperature undergo linear dynamical distortions as it traverses various electrical components on the control line connecting to the quantum device. <br/>If uncompensated for, such distortions can have detrimental effects on gate performance, affecting...master thesis 2023
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Meyer, M. (author), Déprez, C.C. (author), Meijer, Ilja N. (author), Unseld, F.K. (author), Karwal, S. (author), Sammak, A. (author), Scappucci, G. (author), Vandersypen, L.M.K. (author), Veldhorst, M. (author)The small footprint of semiconductor qubits is favorable for scalable quantum computing. However, their size also makes them sensitive to their local environment and variations in the gate structure. Currently, each device requires tailored gate voltages to confine a single charge per quantum dot, clearly challenging scalability. Here, we...journal article 2023
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Xue, X. (author), 't Hart, P.A. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Vladimirescu, A. (author)As big strides were being made in many science fields in the 1970s and 80s, faster computation for solving problems in molecular biology, semiconductor technology, aeronautics, particle physics, etc., was at the forefront of research. Parallel and super-computers were introduced, which enabled problems of a higher level of complexity to be...journal article 2023
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Van Rijs, Samantha (author), Ercan, İlke (author), Vladimirescu, A. (author), Sebastiano, F. (author)Quantum computers process information stored in quantum bits (qubits), which must be controlled and read out by a traditional electronic interface. Co-designing and cooptimizing such a quantum-classical complex system requires efficient simulators to emulate the qubits and their interaction with classical electronics. For spin-qubit readout,...conference paper 2023
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Anders, Jens (author), Babaie, M. (author), Bashir, Imran (author), Charbon, Edoardo (author), Geck, Lotte (author), Ibrahim, Mohamed I. (author), Sebastiano, F. (author), Staszewski, R.B. (author), Vladimirescu, A. (author)Over the past decade, significant progress in quantum technologies has been made, and hence, engineering of these systems has become an important research area. Many researchers have become interested in studying ways in which classical integrated circuits can be used to complement quantum mechanical systems, enabling more compact, performant...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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Van Der Linde, Stan (author), De Kok, Willem (author), Bontekoe, Tariq (author), Feld, S. (author)Compiling a quantum circuit for specific quantum hardware is a challenging task. Moreover, current quantum computers have severe hardware limitations. To make the most use of the limited resources, the compilation process should be optimized. To improve currents methods, Reinforcement Learning (RL), a technique in which an agent interacts...conference paper 2023
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Costa, D.C. (author), Simoni, Mario (author), Piccinini, Gianluca (author), Graziano, Mariagrazia (author)The new quantum era is expected to have an unprecedented social impact, enabling the research of tomorrow in several pivotal fields. These perspectives require a physical system able to encode, process and store for a sufficiently long amount of time the quantum information. However, the optimal engineering of currently available quantum...journal article 2023