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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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Rot, Pepijn (author)The current second quantum revolution heralds the biggest technological advancements of the twenty-first century. At the forefront of this is the development of quantum computers, which promise to bring transformations to almost all sectors, from banking to drug research. With rising investments in developing full-scale, fault-tolerant quantum...master thesis 2023
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- Feirabend, Nienke (author) master thesis 2023
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Chopra, Arnav (author)Quantum networks provide numerous potential benefits over classical networks, such as enhanced security and faster computation, making their further development a lucrative prospect. As is the case with any technology, the advancement of quantum networks relies on the development of frameworks to test their quality, and compare different...bachelor thesis 2023
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Dekeling, Casper (author)In the development of any new technology, it is essential to have methods to assess the quality of a system, to compare different systems to one another, and to compare different versions of the same system, to see if changes to the system can actually be classified as improvements. For quantum networks, this is no different. To further develop...bachelor thesis 2023
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van Loevezijn, Wout (author)Benchmarks for quantum network systems currently are an underrepresented subject in the research field. This paper evaluates how informative a distributed CNOT gate application is, in recognizing errors in the total quantum system. The goal is to decide whether it should be included as a benchmark in a newly developed benchmark suite for quantum...bachelor thesis 2023
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Onkenhout, Job (author)In 2019 a quantum computer performed a highly complex operation in 4 minutes, which would have taken the most powerful supercomputers of today around 10,000 years. Performing calculations unimaginably faster than is currently possible may bring great opportunities, but may implicate a threat to digital communications. Digital communication is...master thesis 2023
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Dreef, Matti (author)Quantum computing is a promising means of satisfying the ever-increasing need for more and faster computations. While some specific applications can already benefit from quantum computing today, a large-scale general-purpose quantum computer is yet to be developed. Many different technologies are being explored to reach this goal, color centers...master thesis 2023
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Driebergen, Tim (author)The minimum vertex cover problem (MinVertexCover) is an important optimization problem in graph theory, with applications in numerous fields outside of mathematics. As MinVertexCover is an NP-hard problem, there currently exists no efficient algorithm to find an optimal solution on arbitrary graphs. We consider quantum optimization algorithms,...master thesis 2023
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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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Seskir, Zeki C. (author), Umbrello, S. (author), Coenen, Christopher (author), Vermaas, P.E. (author)As quantum technologies (QT) advance, their potential impact on and relation with society has been developing into an important issue for exploration. In this paper, we investigate the topic of democratization in the context of QT, particularly quantum computing. The paper contains three main sections. First, we briefly introduce different...journal article 2023
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Gong, J. (author), Charbon-Iwasaki-Charbon, E. (author), Sebastiano, F. (author), Babaie, M. (author)This article presents the first cryogenic phase-locked loop (PLL) operating at 4.2 K. The PLL is designed for the control system of scalable quantum computers. The specifications of PLL are derived from the required control fidelity for a single-qubit operation. By considering the benefits and challenges of cryogenic operation, a dedicated...journal article 2023
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Kiene, G. (author), Overwater, R.W.J. (author), Catania, Alessandro (author), Gunaputi Sreenivasulu, A.M. (author), Bruschi, Paolo (author), Charbon-Iwasaki-Charbon, E. (author), Babaie, M. (author), Sebastiano, F. (author)This article presents a two-times interleaved, loop-unrolled SAR analog-to-digital converter (ADC) operational from 300 down to 4.2 K. The 6-8-bit resolution and the sampling speed up to 1 GS/s are targeted at digitizing the multi-channel frequency-multiplexed input in a spin-qubit reflectometry readout for quantum computing. To optimize the...journal article 2023
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Fakkel, N.E. (author), Mortazavi, S.M. (author), Overwater, R.W.J. (author), Sebastiano, F. (author), Babaie, M. (author)State-of-the-art quantum computers already comprise hundreds of cryogenic quantum bits (qubits), and prototypes with over 10k qubits are currently being developed. Such large-scale systems require local cryogenic electronics for qubit control and readout, leaving the digital controllers for algorithm execution and quantum error correction ...conference paper 2023
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Alarcon, Eduard (author), Abadal, Sergi (author), Sebastiano, F. (author), Babaie, M. (author), Charbon-Iwasaki-Charbon, E. (author), Bolivar, Peter Haring (author), Palesi, Maurizio (author), Staszewski, R.B. (author), Almudever, Carmen G. (author)The grand challenge of scaling up quantum computers requires a full-stack architectural standpoint. In this position paper, we will present the vision of a new generation of scalable quantum computing architectures featuring distributed quantum cores (Qcores) interconnected via quantum-coherent qubit state transfer links and orchestrated via...conference paper 2023
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Ishihara, R. (author), Hermias, J. (author), Neji, S. (author), Yu, K.Y. (author), van der Maas, M.C. (author), Nur, S. (author), Iwai, T. (author), Miyatake, T. (author), Miyahara, S. (author)Quantum computer chip based on spin qubits in diamond uses modules that are entangled with on-chip optical links. This enables an increased connectivity and a negligible crosstalk and error-rate when the number of qubits increases onchip. Here, 3D integration is the key enabling technology for a large-scale integration of the diamond spin...conference paper 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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Sarkar, A. (author), Al-Ars, Z. (author), Bertels, K.L.M. (author)In this research, we extend the universal reinforcement learning agent models of artificial general intelligence to quantum environments. The utility function of a classical exploratory stochastic Knowledge Seeking Agent, KL-KSA, is generalized to distance measures from quantum information theory on density matrices. Quantum process...conference paper 2023
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Stein, Jonas (author), Ott, Dominik (author), Nüßlein, Jonas (author), Bucher, David (author), Schönfeld, Mirco (author), Feld, S. (author)The analysis of network structure is essential to many scientific areas ranging from biology to sociology. As the computational task of clustering these networks into partitions, i.e., solving the community detection problem, is generally NP-hard, heuristic solutions are indispensable. The exploration of expedient heuristics has led to the...journal article 2023
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Ovide, Anabel (author), Rodrigo, Santiago (author), Bandic, M. (author), van Someren, J. (author), Feld, S. (author), Abadal, Sergi (author), Alarcon, Eduard (author), Almudever, Carmen G. (author)Current monolithic quantum computer architectures have limited scalability. One promising approach for scaling them up is to use a modular or multi-core architecture, in which different quantum processors (cores) are connected via quantum and classical links. This new architectural design poses new challenges such as the expensive inter-core...conference paper 2023