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 134 for “"Quantum computers"”.
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Instrumentation for quantum computers
Quantum computation poses challenging engineering and basic physics issues for the control of nanoscale systems. In particular, experimental realizations of up to seven-qubit NMR quantum computers have acutely illustrated how quantum circuits require extremely precise control instrumentation for …
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Machine-Aware Enhancing of Quantum Computers
The realization of a computer that exploits quantum - rather than classical - principles represents a formidable scientific and technological challenge. Today, superconducting quantum processors are achieving significant results in simulation and computation capabilities. However, the realization …
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Photonic quantum computers and communication systems
Quantum information processors have been proposed to solve classically intractable or unsolvable problems in computing, sensing, and secure communication. There has been growing interest in photonic implementations of quantum processors as they offer relatively long coherence lengths, precise state …
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Quantum algorithmic improvements for noisy intermediate scale quantum computers
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Quantum computational chemistry methods for early-stage quantum computers
One of the first practical applications of quantum computers is expected to be molecular modelling. Performing this task would profoundly affect areas such as chemistry, materials science and drug synthesis. Modelling of molecules, which are classically intractable, can be achieved with just over …
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Optimizing Ion-Shuttling Operations in Trapped-Ion Quantum Computers
Trapped ions are a promising candidate for quantum computation. As experiments with ions increase in size and complexity, a trap array-based architecture for an ion trap with many independent zones provides a path towards large-scale integration. A crucial element in the operation of a trap array …
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Scaling trapped-ion quantum computers with CMOS-integrated state readout
Quantum information processing (QIP) has emerged as a powerful new computing paradigm as traditional Moore's law scaling slows due to skyrocketing costs of shrinking feature sizes, interconnects becoming the dominant source of energy consumption and delay as transistor critical dimensions fall …
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Pricing options on quantum computers: state of the art and outlook
… pricing financial derivative contracts and how quantum computers can be used to accelerate the computing process currently performed on classical computers. More precisely, I provide concrete explanations on how previously suggested circuits work and I give examples of implementations of these …
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Improving Scalability of Trapped-Ion Quantum Computers Using Gate-Level Techniques
… a promising platform to build a practical quantum computer. Scaling the high performance of small systems to longer ion chains is a technical endeavor that benefits from both better hardware system design and gate-level control techniques. In this thesis, I discuss our work on building a …
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Design and Experimental Demonstration of a Scalable Acoustic Analogue of Quantum Computers
Computers have transformed the way we live, work, and innovate. While Quantum computers based on quantum bits (qubits) exploit principles such as superposition and entanglement to offer unprecedented computational power compared to conventional computers. However, their scalability and practical …
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Using Device Physics and Error Mitigation to Improve the Performance of Quantum Computers
Quantum computers have seen rapid development over the last two decades. Despite this, they are not yet scalable or fault-tolerant (i.e. we cannot address arbitrarily many error-corrected qubits). Therefore, improvements that include consideration of the underlying physics are paramount. To do …
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Approximating a wavelet kernel using a quantum computer
Machine learning and quantum computing are both fields which have gained a significant amount of popularity and attention in recent years. The intersection of these two fields, quantum machine learning, looks at whether quantum computers can aid or improve classical machine learning methods, or …
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Quantum computation beyond the circuit model
The quantum circuit model is the most widely used model of quantum computation. It provides both a framework for formulating quantum algorithms and an architecture for the physical construction of quantum computers. However, several other models of quantum computation exist which provide useful …
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QAOA applied to the portfolio optimization problem
Quantum computing is no longer in its early stages. There already exists quantum computers with more qubits than a classical computer is capable of efficiently simulating. This current stage is considered intermediate and is therefore called the NISQ era (noisy intermediate-scale quantum). The main …
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All Pass Readout With Ring Resonators for Qubit Measurement
Quantum computers may advance computing by solving some NP complexity problems, such as factoring and simulating quantum systems. Superconducting qubits, configurable artificial atoms comprised of circuit elements, are a leading platform to create quantum computers. Many schemes for superconducting …
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The power of restricted quantum computational models
Restricted models of quantum computation are ones that have less power than a universal quantum computer. We studied the consequences of removing particular properties from a universal quantum computer to discover whether those resources were important.In the first part of the thesis we studied …
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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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High-fidelity Two-qubit Gates and Noise Spectroscopy with Superconducting Qubits
… gates remain the bottleneck in realizing quantum computing applications. To build robust quantum computers, it is crucial to identify the dominant sources of errors and suppress them by engineering the control and architecture of qubit systems. In this thesis, we implement a tunable …
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Optimizing coherence and anharmonicity of superconducting qubit
Quantum computers utilize qubits to store and process quantum information. In superconducting quantum computers, qubits are implemented as quantum superconducting resonant circuits. The circuits are operated only at the two energy states, which form the computational basis for the qubit. To …
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Topics in Computing with Quantum Oracles and Higher-Dimensional Many-Body Systems
Since they were first envisioned, quantum computers have oft been portrayed as devices of limitless power, able to perform calculations in a mere instant that would take current computers years to determine. This is, of course, not the case. A huge amount of effort has been invested in trying to …
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