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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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Splitthoff, L.J. (author)
Superconducting circuits in cryogenic environments form an excellent material platform for the realization and study of quantum systems. <br/>In this thesis, we continue the exploration of novel types of circuit elements which expand the circuit quantum electrodynamics toolbox to enable exotic, and potentially better circuit implementations. To...
doctoral thesis 2024
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Pita-Vidal, Marta (author)
Josephson junctions implemented in semiconducting nanowires proximitized by a superconductor exhibit intricate physics arising from the interplay of electron-electron interactions, superconductivity, spin-orbit coupling, and the Zeeman effect. This thesis explores these phenomena through a series of experiments conducted using circuit quantum...
doctoral thesis 2023
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Levajac, V. (author)
Quantum technology is a developing field of sciencewhere devices possess novel and superior functionalities thanks to their quantum-mechanical behaviour at the nanometer scale. A typical example is a quantum computer, where information is stored in quantum states of its quantum bits. By manipulating entangled and superposition states of these...
doctoral thesis 2023
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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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van Loo, N. (author)
The development of quantum computers is perhaps one of the most exciting innovations of our time. The most investigated quantum computers, however, suffer from the fact that quantum information is lost due to interaction between the quantum bits and their environment. As a radically different approach, it has been proposed that one can instead...
doctoral thesis 2023
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Wang, Guanzhong (author)
The search for Majoranas bound states has witnessed heated efforts in the past decade. This field of research lies at the intersection of both scientific and commercial interests. The Majorana quasiparticle, being its own antiparticle and exhibiting non-abelian exchange statistics, is a unique member of the family of condensed-matter...
doctoral thesis 2023
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Möhle, C.M. (author)
Majorana zero modes (MZMs) are a topic of intense research as they constitute the main building block of topological qubits - a qubit type with potentially enhanced coherence time. A promising way to create these quantum states is to couple a one-dimensional (1D) semiconducting segment with spin-orbit interaction to a superconductor, in the...
doctoral thesis 2023
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Xu, D. (author)
Quantum computing is a flourishing field of scientific and technological research. The development of quantum computing in the past decades is the so-called second quantum revolution, where various aspects of quantum physics, such as entanglement and superposition, are used to form the main building block of computation — the quantum bit, or...
doctoral thesis 2022
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de Jong, D. (author)
Quantum mechanics yields exciting opportunities for developing novel technologies. In particular, quantum computation enables performing otherwise intractable calculations. However, unwanted disturbances to the quantum bits (qubits) form a formidable challenge for its implementation. Topologically encoding information protects against these...
doctoral thesis 2021
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Uilhoorn, W. (author)
The technology of quantum computing is believed to solve certain computational problems significantly faster than classical computers, enabling classically inaccessible problems. However, the technology is still in its infancy and it is still too early to conclude which physical system(s) will form the basis of tomorrow's quantum computer. Small...
doctoral thesis 2021
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Borsoi, F. (author)
After a century from the quantum description of nature, the scientific community has laid the basis for using nature's properties to our advantage. The quantum technology vision stems from the idea of capitalizing these principles in various sectors, such as computation and communication. However, in contrast to classical processors, encoding...
doctoral thesis 2021
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Bouman, D. (author)
Quantum technology is an exciting research area that has gained a lot of interest in the past few decades with the advances made in quantum computing. The quantum computer promises speedups that are impossible to achieve with classical computers. It does so by exploiting quantum mechanical properties such as entanglement and superposition with...
doctoral thesis 2021
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Bommer, J.D.S. (author)
In the voyage towards solving increasingly challenging computations of physical systems, quantum computation has arisen as a contender for conventional computational approaches. To address the issue of keeping the required quantum mechanical states sufficiently stable against environmental disturbances, novel proposals suggested to employ...
doctoral thesis 2021
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Yurttagul, N.F. (author)
Of all parameters, determining the behaviour of a physical system in the laboratory, temperature is one of the most important, if not themost important. The study of solid matter at cryogenic temperatures revealed unexpected phenomena like superconductivity and was closely related to the verification of new and revolutionary concepts in...
doctoral thesis 2020
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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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Kroll, J. (author)
Majorana bound states (MBSs) are novel particles predicted to be created when superconductor/semiconductor hybrid structures with strong spin-orbit coupling are subjected to strong magnetic fields. Expected to exhibit non-Abelian exchange statistics, they could form the basis of a new kind of quantum computer that is inherently protected from...
doctoral thesis 2019
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de Moor, M.W.A. (author)
Quantum technology is a promising area of research, with the quantum computer as the prime example. Quantum computers can perform calculations thought to be impossible by conventional means. The fundamental building block of a quantum computer is a qubit, which is a quantumsystem which can be used to process and store quantuminformation. Most...
doctoral thesis 2019
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Proutski, A. (author)
Materials possessing superconducting properties are highly sought after due to their potential technological applications. Much of the work has focused on utilising a thin insulating barrier separating a pair of superconducting electrodes, a Josephson junction, as a workhorse in the field of superconducting based quantumcomputation. Yet such...
doctoral thesis 2019
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Lüthi, F. (author)
Quantum computers promise to solve certain problems such as quantum chemistry simulations much more efficiently than their classical counterparts. Although it is still unclear what material system will ultimately host large-scale quantum computers, solid-state systems are promising candidates due to their inherent scalability and advanced...
doctoral thesis 2019
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