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Verduyn, Thomas (author)The need of computational power for engineering applications has been ever increasing and with classical computers approaching their physical limits, new ways of improvement have to be investigated. One of the promising solutions is quantum computing. Most engineering problems require solving a system of linear equations of higher dimensions and...master thesis 2022
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Witmer, Brian (author)Quantum technology is evolving faster than ever. Currently, all eyes are on the quantum computer, the promising computer that can solve problems which are unsolvable for regular computers. In order to understand this new technology, it is necessary to understand the qubit, the basic unit of quantum information. This can be done by means of the...bachelor thesis 2022
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Bonke, Noud (author)We introduce a method of designing NMR pulse sequences, with a specific focus toward complete decoupling of carbon13 spin qubits coupled to a nitrogenvacancy (NV) center in diamond. Using Average Hamiltonian Theory, we calculate different intermediate Hamiltonians corresponding to different rotations implemented by NMR pulses. Two novel pulse...bachelor thesis 2022
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SOTIROPOULOS, YORGOS (author)High fidelity GHZ states among remote nodes is a precious commodity which can allow for nonlocal stabilizer measurements and thus pave the way for a modular faulttolerant quantum computer. To this end, we extend the high fidelity intracavity gate introduced by Borregaard et al. (2015) to distributed paradigm, consisting of SnVinspired atomic...master thesis 2022
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SAMIOTIS, MARIOS (author)In this work, we first analyse a theoretical technique based on entropic inequalities, which in principle can be used to compare classical and quantum algorithms running on noisy quantum devices. The technique has been used in the past for depolarizing noise, and has shown that for NISQ variational quantum algorithms (VQAs) to give an advantage...master thesis 2022
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Coenen, Christopher (author), Grinbaum, Alexei (author), Grunwald, Armin (author), Milburn, Colin (author), Vermaas, P.E. (author)Due primarily to technological advances over the last decade, quantum research has become a key priority area for science and technology policy all over the world. With this manifesto, we wish to prevent quantum technology from running into fiascos of implementation at the interface of science and society. To this end, we identify key stumbling...journal article 2022
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Steinberg, M.A. (author), Feld, S. (author), Almudever, Carmen G. (author), Marthaler, Michael (author), Reiner, Jan Michael (author)The qubitmapping problem aims to assign and route qubits of a quantum circuit onto an noisy intermediatescale quantum (NISQ) device in an optimized fashion, with respect to some cost function. Finding an optimal solution to this problem is known to scale exponentially in computational complexity; as such, it is imperative to investigate...journal article 2022
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Dijkhorst, AnneFleur (author)In this research, the implementations of quantum random walks in superconducting circuitQED are studied. In particular, a walk that moves across the Fock states of a quantum harmonic oscillator by a JaynesCummings model is investigated, which is difficult to implement because of different Rabi frequencies for different Fock states....bachelor thesis 2021
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de Vries, Olaf (author)In this work, ClebschGordan coefficients are studied from both a quantum mechanical and a mathematical perspective. In quantum mechanics, ClebschGordan coefficients arise when two quantum systems with a certain angular momentum are combined and the total angular momentum is to be found. We start by discussing the relevant postulates of quantum...bachelor thesis 2021
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Waaijer, Marijn (author), van Neerven, J.M.A.M. (author)We present an analysis of the Frauchiger–Renner Gedankenexperiment from the point of view of the relational interpretation of quantum mechanics. Our analysis shows that the paradox obtained by Frauchiger and Renner disappears if one rejects promoting one agent’s certainty to another agent’s certainty when it cannot be validated by records...journal article 2021
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van Winden, Joris (author)In this thesis, networks of coupled quantum harmonic oscillators are studied. The dynamics of these networks are determined by singlefrequency vibrations of the entire network called normal modes. We study the behavior of the nor mal modes when the network is coupled to a thermodynamical heat bath by looking at the Lindblad Master Equation of...bachelor thesis 2020
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Bosma, Jan (author)The first part of this thesis provides a mathematical description for bipartite quantum correlations, aiming to analyze the geometry of several sets of correlations. We explain why quantum entanglement can be used to simulate shared randomness: C<sub>loc</sub>(Γ) ⊆ C<sub>q</sub><sup>d</sup>(Γ) for a sufficiently large d. The known bound for this...bachelor thesis 2020
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Stroeks, Maarten (author)Quantum systems are in general not e_ciently simulatable by classical means. If one wishes to determine (some of) the eigenvalues of a Hamiltonian H that is associated with a quantum system, there are two favoured strategies: Quantum simulation and quantum Monte Carlo schemes. The former strategy uses an experimentally wellcontrollable quantum...master thesis 2020
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van Laarhoven, Menno (author)The concept of entanglement is one of the distinguishing features in quantum mechanics. Information about one particle can determine the state of another particle. This information and entanglement in subsystems is quantified by the entanglement entropy. The entanglement entropy has become an important research topic in recent years....bachelor thesis 2020
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Nijholt, B. (author)By exploiting quantum mechanics, quantum computers are able to solve problemsfor example in quantum chemistrythat are far out of reach of classical computers. Conventional approaches to quantum computers use qubits (quantum bits) that can either be made out of superconducting circuits (the currently leading approach used to demonstrate...doctoral thesis 2020
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Arat, K.T. (author), Hagen, C.W. (author)The sensitivity of simulated scanning electron microscopy (SEM) images to the various physical model ingredients is studied using an accurate, but slow simulator, to identify the most important ingredients to include in a reliable and fast SEM image simulator. The quantum mechanical transmission probability (QT) model and the electron...journal article 2020
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Lau, Y.M. (author), Westerweel, J. (author), van de Water, W. (author)We use Faraday waves to measure interfacial tension σ between two immiscible fluids, with an interest in (ultra)low values of σ. The waves are excited by vertically oscillating the container in which the fluids reside. Using linear stability theory, we map out the accessible range of interfacial tensions. The smallest value (σmin ≈ 5 × 104 N...journal article 2020
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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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Loor, Stephan (author)In this thesis, two topics are studied: mathematical inequalities and nonlinear quantum entanglement witnesses. First, various inequalities, like the CauchySchwarz inequality (on finite dimensional vector spaces) and Jensen's inequality, along with their extensions and generalisations, are proved and discussed. The intimate relationship...bachelor thesis 2019
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van Holten, T. (author)This paper addresses the longstanding question of how it may be explained that the three charged leptons (the electron, muon and tau particle) have different masses, despite their conformity in other respects. In the field of Emergent Quantum Mechanics nonsingular electron models are being revisited, and from this exploration has come a...journal article 2019
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