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du Fossé, I. (author)
Due to their size-dependent properties, high photoluminescence quantum yield and relatively cheap solution-based processing, colloidal quantum dots (QDs) are of great interest for application in optoelectronic devices. However, the efficiency of these devices is often limited by the presence of trap states: localized electronic states that lead...
doctoral thesis 2023
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Paquelet Wuetz, B. (author)
Spin qubits in silicon have emerged as a promising candidate for a scalable quantum computer due to their small footprint, long coherence times, and their compatibility with advanced semiconductor manufacturing. However, all known spin qubit material hosts come with specific challenges, that limit the performance of quantum information...
doctoral thesis 2022
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Lawrie, W.I.L. (author)
Quantum computers based on semiconductor quantum dots are proving promising contenders for large scale quantum information processing. In particular, group IV based semiconductor hosts containing an abundance of nuclear spin-zero isotopes have made considerable headway into fulfilling the requirements of a universal quantum computer. Silicon (Si...
doctoral thesis 2022
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Xue, X. (author)
Benchmarking the performance of a quantum computer is of key importance in identifying and reducing the error sources, and therefore in achieving fault-tolerant quantum computation. In the last decade, qubits made of electron spins in silicon emerged as promising candidates for practical quantum computers. To understand their physical properties...
doctoral thesis 2022
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van Diepen, C.J. (author)
More is more applies in particular to systems with interacting parts. These interactions enable the emergence of collective behaviour. Examples can be found among the behaviour of animals, such as the V-shaped formation of migrating geese and the flight of a flock of starlings. More examples are found among the electromagnetic properties of...
doctoral thesis 2021
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XU, Y. (author)
With continuous breakthroughs in quantum science and technology in recent years, the development of quantum computers is moving from pure scientific research to engineering realization. Meanwhile, the underlying physical structures also develop from the initial single qubit to multiple qubits or medium-scale qubit registers. Since qubits are...
doctoral thesis 2021
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Eenink, H.G.J. (author)
The understanding of quantum mechanics enabled the development of technology such as transistors and has been the foundation of today’s information age. Actively using quantum mechanics to build quantum technology may cause a second revolution in handling information. However, to execute meaningful algorithms, largescale quantum computers have...
doctoral thesis 2021
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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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Zheng, G. (author)
This dissertation describes a set of experiments with the goal of creating a super-conductor-semiconductor hybrid circuit quantum electrodynamics architecture with single electron spins. Single spins in silicon quantum dots have emerged as attractive qubits for quantum computation. However, how to scale up spin qubit systems remains an open...
doctoral thesis 2021
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Island, J.O. (author)
In this thesis we investigate superconducting hybrids made from two material systems, namely, molecules and layered materials. For studies of superconducting phenomena in molecular junctions we develop two platforms which rely on the superconducting proximity effect to preserve pre-existing nano-gap formation techniques and bonding chemistries....
doctoral thesis 2016
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Van den Berg, J.W.G. (author)
doctoral thesis 2014
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Braakman, F.R. (author)
The coherent coupling of electron charges and spins is investigated in small quantum dot arrays.
doctoral thesis 2013
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Keijzers, C.J.H. (author)
doctoral thesis 2012
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Perinetti, U. (author)
This thesis presents different optical experiments performed on semiconductor quantum dots. These structures allow to confine a small number of electrons and holes to a tiny region of space, some nm across. The aim of this work was to study the basic properties of different types of quantum dots made of various materials and with different...
doctoral thesis 2011
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Liu, X.L. (author)
Graphene is an exceptionally thin semiconductor that consists of only one atomic layer of carbon atoms. The electrons in graphene live in a strictly two-dimensional (2D) world. In addition to this remarkable 2Dness, it is also peculiar that the behavior of the electrons in graphene is governed by the Dirac equation rather than the well known...
doctoral thesis 2010
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Götz, G.T.J. (author)
We experimentally investigate Quantum Dots, formed in Carbon Nanotubes. The first part of this thesis deals with charge sensing on such quantum dots. The charge sensor is a metallic Single-electron-transistor, sensitive to the charge of a single electron on the quantum dot. We use this technique for real-time charge readout and precise tuning of...
doctoral thesis 2010
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Nowack, K.C. (author)
doctoral thesis 2009
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Bodoky, F. (author)
The goal of this thesis is to investigate theoretically the generation and behaviour of multipartite entanglement for solid-state nanosystems, in particular electron spin quantum bits (so-called 'qubits') in quantum dots. A quantum dot is a tiny potential well where a single electron can be trapped. A quantum bit can be implemented in this...
doctoral thesis 2009
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Loef, R. (author)
Space charges in two heterojunctions (i.e., TiO2/CuInS2 and TiO2/QD-CdSe) are studied by means of impedance spectroscopy and capacitance studies. Several lattice defects are found. When applied in solar cells, the defects may have a negative effect on the efficiency. Therefore, it is important to know the nature of the defects. In this thesis a...
doctoral thesis 2009
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Vink, I.T. (author)
Besides an electric charge, electrons also have a tiny magnetic moment, called spin. In a magnetic field, the spin has two possible orientations: 'spin-up' (parallel to the field) and 'spin-down' (anti-parallel to the field) and can therefore be used as a quantum bit, the computational unit of a quantum computer. For quantum computations,...
doctoral thesis 2008
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