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Boter, J.M. (author)To harness the potential of quantum mechanics for quantum computation applications, one of the main challenges is to scale up the number of qubits. The work presented in this dissertation is concerned with several aspects that are relevant in the quest of scaling up quantum computing systems based on spin qubits in silicon. Fewqubit experiments...doctoral thesis 2020
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van Houte, Roy (author)Quantum coin flipping is a cryptographic primitive in which two or more parties that do not trust each other want establish a fair coin flip. These parties are not physically near each other and use quantum communication channels to interact. A quality of protocols is measured by the best possible cheating strategy, which is the solution of a...master thesis 2020
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Vuillot, C. (author)Quantumcomputation is the modern version of Schrödinger’s cat experiment. It is backed up in principle by the theory and thinking about it can make people equally uncomfortable and excited. Besides, its practical realization seems so extremely challenging that some people even doubt it is possible. On the other hand, we are nowadays much closer...doctoral thesis 2020
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Kuś, Gaweł (author)The datadriven approach shows great potential for designing new materials with unprecedented properties by using machine learning and optimization. Recently, a datadriven framework was successfully applied to design a unit cell of metamaterial achieving supercompressibility, despite being built out of brittle base material. The key element of...master thesis 2019
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Lao, L. (author)Quantum computing promises to solve some problems that are intractable by classical computers. Several quantum processors based on different technologies and consisting of a few tens of noisy qubits have already been developed. However, qubits are fragile as they tend to decohere extremely quickly and quantum operations are faulty, making...doctoral thesis 2019
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Mulderij, Jesse (author)Over the course of the last decade, an interest has emerged in nearest neighbor constraints for quantum circuit design. The challenge herein is to bothminimize the running time of a circuit and tomodify it such that quantum gates only act on adjacent qubits while leaving the desired computational operation intact. These modifications involve the...master thesis 2019
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Ubbens, Otmar (author)With the rapid development of Quantum Computers (QC) and QC Simulators, there will be an increased demand for functioning Quantum Algorithms in the near future. Some of the most ubiquitously useful algorithms are solvers for linear systems of equations. Since the conception of the Quantum Linear Solver Algorithm (QLSA) by Harrow, Hassidim and...bachelor thesis 2019
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Leijenhorst, Nando (author)Quantum error correction is needed for future quantum computers. Classical error correcting codes are not suitable for this due to the nature of quantum mechanics. Therefore, new codes need to be developed. A promising candidate is the toric code, a surface code, because of its locality and its high error correcting capability and thresholds ...bachelor thesis 2019
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Padalia, Pinakin (author)Voltage references are one of the fundamental building blocks for designing any analog processing circuit. It serves as a reference for Analog to Digital Converters (ADCs), Digital to Analog Converters (DACs), power/voltage regulators and other measurement and control circuits. The performance of all these circuits cannot be better than the...master thesis 2019
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Overwater, Ramon (author)The quantum bits (qubits) at the core of any quantum computers are so fragile that quantum error correction(QEC) schemes are needed to increase their robustness and enable faulttolerant quantum algorithms. The surface code is one of the most popular QEC schemes, but it requires the availability of an efficient decoder. While neural networks...master thesis 2019
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Yadav, Amitabh (author)Quantum Computing is an emerging field of technology with the promise that engineered quantum systems can address hard problems such as, problems with exponential compute complexity in Chemistry, Genomics, Optimization and many more applications. Quantum Computer Architecture is an area of research targeted for the NISQera quantum computing and...master thesis 2019
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Vaal, Elmore (author)Superconductingnormalconductingsuperconducting (SNS) transmons with 2facet Alshell nanowires are qubits compatible with magnetic fields above 10 mT. There are important correlations of the room temperature nanowire resistance with the chance of the qubit being measurable: at a resistance of 2−3 kΩ, the qubit is almost guaranteed to work. The...master thesis 2019
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van Veen, J. (author)Quantum computers can solve some problems exponentially faster than classical computers. Unfortunately, the computational power of quantum computers is currently limited by the number of working qubits. It is difficult to scale up these systems, because qubits are easily affected by noise in their environment. This noise leads to decoherence:...doctoral thesis 2019
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Quantum information in the real world: Diagnosing and correcting errors in practical quantum devicesHelsen, J. (author)Quantum computers promise to be a revolutionary new technology. However, in order to realise this promise many hurdles must first be overcome. In this thesis we investigate two such hurdles: the presence of noise in quantum computers and limitations on the connectivity and control in large scale quantum computing architectures.In order to combat...doctoral thesis 2019
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Varsamopoulos, S. (author)Quantum error correction (QEC) is key to have reliable quantum computation and storage, due to the fragility of qubits in current quantum technology and the imperfect application of quantum operations. In order to have efficient quantum computation and storage, active QEC is required. QEC consists of an encoding and a decoding process. The way...doctoral thesis 2019
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Serrão Morato Moreira, Miguel (author)The goal of this thesis is the design and development of the QuTech Central Controller, a system conceived to serve as the hardware/software interface of a quantum computer. This system represents an evolution of the QuMA microarchitecture to control a Surface17 superconducting quantum processor, even though several architectural mechanisms are...master thesis 2019
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de Jong, Jarn (author)Quantum computing is a field that shows tremendous possibilities and promise. It can provide an exponential speedup compared to classical computers in many computational problems, including simulations of general quantum mechanical systems, pattern finding and solving linear systems. Quantum computations can be performed by making use of qubits...master thesis 2019
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Driebergen, Tim (author)Currently there are no efficient quantum algorithms for the addition of realvalued numbers. In classical computers addition is performed by using barrel shifters, a concept proven to be very inefficient as a quantum circuit due to its many garbage outputs when the barrel shifter is made reversible. This thesis aims to design a quantum algorithm...bachelor thesis 2019
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Yang, Yaoling (author)Quantum computers hold the promise to solve some hard problems that are intractable for even the most powerful current supercomputers. One of the most famous examples is Shor's algorithm for factorizing large numbers, which has exponential speedup compared to its best classical counterparts.<br/>However, running such an algorithm will require to...master thesis 2019
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Ciani, A. (author), Terhal, B.M. (author), Divincenzo, D. P. (author)We consider how the Hamiltonian Quantum Computing scheme introduced in (2016 New J. Phys. 18 023042) can be implemented using a 2D array of superconducting transmon qubits. We show how the scheme requires the engineering of strong attractive crossKerr and weak flipflop or hopping interactions and we detail how this can be achieved. Our...journal article 2019