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Scaling a spin qubit quantum processor from two to six qubits

Philips, S.G.J. (author)

Physicist have been entertaining the idea of a quantum computer for quite a while. The theoretical foundations of this idea are well understood and it is clear that certain calculations can be performed significantly faster compared to the classical computer. Consequently, research in quantum computation is seen as a promising and valuable...

doctoral thesis 2023

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Silicon/silicon-germanium heterostructures for spin-qubit quantum processors

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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Performance benchmarking of silicon quantum processors

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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Scaling spin qubits in quantum dots more - distant - industrial

Zwerver, A.M.J. (author)

The discovery of the counter-intuitive laws of quantum mechanics at the beginning of the 20th century revolutionized physics. Quantum-mechanical properties, such as superposition and entanglement, can be harnessed to create quantum technology that opens a computing power far beyond the computing power that we know today. A quantum computer would...

doctoral thesis 2022

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Quantum simulation with electron spins in quantum dots

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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Gate-based readout of hybrid quantum dot systems

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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On-chip integration of Si/SiGe-based quantum dots and electronic circuits for scaling

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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Qubit arrays in germanium

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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Circuit Quantum Electrodynamics with Single Electron Spins in Silicon

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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Universal quantum logic in hot silicon qubits

Petit, L. (author)

In the last decade silicon has emerged as a potential material platform for quantum information. The main attraction comes from the fact that silicon technologies have been developed extensively in the last semiconductor revolution, and this gives hope that quantum dots can be fabricated one day with the same ease transistors are made today....

doctoral thesis 2021

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Control for Programmable Superconducting Quantum Systems

Rol, M.A. (author)

The discovery of quantum mechanics in the 20th century forms the basis of many of the technologies that define our lives today. The ability to engineer and manipulate individual quantum systems -- even create artificial atoms -- promises a similar revolutionary leap in technology. A quantum technology of particular interest is quantum computing,...

doctoral thesis 2020

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Protecting quantum entanglement by repetitive measurement

Bultink, C.C. (author)

Information processing based on the laws of quantum mechanics promises to be a revolutionary new avenue in information technology. This emerging field of quantum information processing (QIP) is however challenged by the fragile nature of the quantum bits (qubits) in which quantum information is stored and processed. An error in even a single...

doctoral thesis 2020

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Scaling Aspects of Silicon Spin Qubits

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. Few-qubit experiments...

doctoral thesis 2020

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Quantum simulation using arrays of gate-defined quantum dots

Mukhopadhyay, U. (author)

We are entering the era of the second quantum revolution, where we aim to harness the power of quantum mechanics to create new technologies. Quantum technologies have the potential to revolutionize the fields of simulation, computation, communication, sensing, metrology, and many others. Here we discuss analog quantum simulation, which has...

doctoral thesis 2019

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Emulating Fermi-Hubbard physics with quantum dots: from few to more and how to

Hensgens, T. (author)

Interacting electrons on material lattices can build up strong quantum correlations, which in turn can lead to the emergence of a wide range of novel and potentially useful magnetic and electronic material properties. Our understanding of this physics, however, is severely limited by the exponential growth in complexity with system size, which...

doctoral thesis 2018

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Nanoscale Electrostatic Control of Superconducting Oxide Interfaces

Mulazimoglu, E. (author)

doctoral thesis 2017

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Electronic Transport in Helium Beam Modified Graphene and Ballistic Josephson Junctions

Nanda, G. (author)

This thesis describes the capabilities of the helium ion microscope (HIM) and that of graphene to explore fundamental physics and novel applications. While graphene offers superior electronic properties, the helium ion microscope allows us to combine imaging and modification of materials at the nanoscale. We used the capabilities of HIM to grow...

doctoral thesis 2017

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Characterization of an electron spin qubit in a Si/SiGe quantum dot

Kawakami, E. (author)

doctoral thesis 2016

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CCD operation and long-range coupling of spins in quantum dot arrays

Baart, T.A. (author)

doctoral thesis 2016

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Spin and Valley Physics in a Si/SiGe Quantum Dot

Scarlino, P. (author)

doctoral thesis 2016