Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Quantum Technology"”.
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Fabrication and characterization of telecom quantum emitter in silicon for quantum technology applications.
L'abstract è presente nell'allegato / the abstract is in the attachment
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Dynamics of the Gross-Pitaevskii Equation and Shortcuts to Adiabaticity
… adiabatic way have applications in many areas of quantum technology. However, explicitly employing adiabatic evolution often leads to decoherence issues due to systems interacting with their environment. For this reason, there has been much interest in developing shortcuts to adiabaticity in which …
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The complexity of sampling from a weak quantum computer
Quantum computers have the promise of revolutionizing information technology, artificial intelligence, cryptography, and industries such as drug design. Up until this point our main understanding of quantum computing has been bound to theoretical speculations which has successfully lead to the …
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Algorithmic Design and Optimization for Quantum Computation with a Qubit-Oscillator System
Quantum computation has long been dominated by a digital approach using the qubit, which exists in a two-dimensional vector space, as its basic unit. More recently, there has been increasing interest in an analog approach, which uses as its basic unit a qudit in an infinite-dimensional vector …
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Hofstadter Physics and Composite Fermionic Phase in Moiré Systems
… provide fertile ground for investigating novel quantum states. A key focus is on understanding Hofstadter physics and the emergence of composite fermion phases in these materials. In this work, we first develop a continuum model to describe the low-energy electronic structure of twisted TMD …
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Lower bounds on the classical simulation of quantum circuits for quantum supremacy
… progress, no task has yet been performed on quantum technology that could not also have been performed quickly on today's classical computers. One proposed path toward achieving this milestone, which is often referred to as quantum supremacy, is to perform specific types of quantum circuits …
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NMR studies of quantum thermalization
Quantum thermalization is a generic process that a quantum system reaches its equilibrium. Quantum thermalization lies in the interface of various distinct fields, ranging from condensed matter physics and quantum cosmology to quantum information science. The converging efforts from different …
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Quantum Semiconductor Structures Dressed with Terahertz Cavity Photons
Cavity quantum electrodynamics (cQED) deals with an ensemble of two-level atoms coupled with a single mode of electromagnetic fields in a cavity. The theory of atomic cQED is well-developed, allowing one to make precise predictions for the quantum dynamics of atom–photon hybrids, indispensable for …
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Chemical Control of the Spin-Phonon Interaction to Develop a New Generation of Molecular Quantum Bits
… of new technologies such as molecular quantum bits and quantum memories. Implementing these materials is fundamentally limited by the rapid decay of populations of electronic spins back to magnetic equilibrium. Because of the small energy scale of paramagnetic interactions, the time a …
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Opportunities for U.S.-China scientific collaboration in building a bilateral quantum network
… in time transfer to networked science, quantum networks can enable a new host of experiments that would not otherwise be achievable. We can learn a lot about building such a network to connect quantum resources globally through international cooperation. Toward this end, we argue that …
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Quantum State Estimation and Tracking for Superconducting Processors Using Machine Learning
<p>Quantum technology has been rapidly growing; in particular, the experiments that have been performed with superconducting qubits and circuit QED have allowed us to explore the light-matter interaction at its most fundamental level. The study of coherent dynamics between two-level systems and …
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Exploring Anisotropic Noise and Fast Gates with Superconducting Qubits
Rapid recent progress in the engineering of quantum systems across multiple platforms has enabled quantum science at never-before-seen precision and scale, and may yield useful quantum technology. However, two major challenges slow such progress: (1) decoherence from interactions between target …
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Quantum spins in semiconductor nanostructures: Hyperfine interactions and optical control
Quantum information technologies offer significantly more computational power for certain tasks and secure communication lines compared to the available classical machines. In recent years there have been numerous proposals for the implementation of quantum computers in several different systems …
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Coherent Interaction Between Laser Photons and Single Spins in InAs Quantum Dots
… photons and single spins in two types of InAs quantum dots. Quantum dots are promising candidates for quantum information applications due the potential for on-demand emission of highly pure and indistinguishable photons. Achieving coherent interactions between photons and quantum dot spins is …
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Generation and Uses of Distributed Entanglement in Quantum Information
In this thesis, we focus on the questions of how quantum entanglement can be generated between two or more spatially separated systems and, once generated, how it can be applied in quantum technology. First we will discuss a protocol, which we conjecture to be optimal in some regimes, that quickly …
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Nanoscale magnetometry with a microcontroller-based magnetometer using a single nitrogen-vacancy defect in nanodiamond
… application areas such as nanomagnetometry, quantum information processing and nanobiothermometry, as well as for the development of new applications in the spintronic area and quantum technology. The NV− defect is a solid-state system that presents extraordinary sensitivity to magnetic …
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Optimized resources for efficient optical quantum information processing and sensing
… resources in facilitating efficient optical quantum information processing and sensing. Three key applications are considered: quantum interferometry, detector characterization, and multi-photon processing. For each application, we examine the underlying quantum resource states and quantum …
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Quantum technologies with superconducting artificial atoms
… possible routes to the future exploitation of quantum technologies in superconducting artificial atoms. The objectives of the thesis are twofold. On the one hand, we study advanced control of the quantum states of individual artificial atoms, tailored at robust and faithful quantum information …
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Momentum-space lattices for ultracold atoms
… easy to access and control. This is the idea of quantum simulation, where one system exactly mimics another when they are subjected to equivalent physical scenarios. Topological systems, those with a property that is stabilized by their specific configuration, are often quite challenging to …
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Accoppiamento ultra-forte in sistemi quantistici aperti per le tecnologie quantistiche
Il campo delle interazioni luce-materia è una parte vitale della ricerca nell'informazione quantistica, nell'ottica quantistica e nella fisica della materia condensata. L'interazione luce-materia è una componente fondamentale della nostra comprensione del mondo fisico. Comprendere i processi …