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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 42 for “"trapped ion"”.
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Programmable System for Laser Control of Trapped-Ion Experiments
Modern quantum computing experiments demand exceptional precision, especially when controlling laser pulses for trapped-ion systems. Recent optical breakthroughs now pack dozens of channels onto a single chip, enabling efficient multichannel laser control. However, the supporting electronics often …
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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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Compensating sequences for robust quantum control of trapped-ion qubits
Universal quantum computation requires precision control of the dynamics of qubits. Frequently accurate quantum control is impeded by systematic drifts and other errors. Compensating composite pulse sequences are a resource efficient technique for quantum error reduction. This work describes …
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Integration of Advanced Optics for Trapped Ion Quantum Information Processing
<p>Trapped ion systems are the leading candidate for quantum information processing because many of the critical components have already been demonstrated. Scaling trapped ion systems to large numbers of ions is currently believed possible, but much work remains to prove it. Microfabricated surface …
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An optical-fiber interface to a trapped-ion quantum computer
The trapped-ion quantum computer is an atom-based implementation of a quantum computer that has successfully demonstrated numerous quantum algorithms and the potential for scalability. Fundamental to its operation is the short-range Coulombic interaction among its atomic ion registers, which has …
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Integrated Technologies and Control Techniques for Trapped Ion Array Architectures
Over the past few decades, trapped ions have emerged as one of the top contenders for realizing large scale quantum information processing. To date, experiments with ions have reached the level of tens of ion qubits, but the current model of adding ions to long chains may not extend to the number …
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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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Improving Scalability of Trapped-Ion Quantum Computers Using Gate-Level Techniques
<p>Trapped ions provide 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 …
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Integrated chips and optical cavities for trapped ion quantum information processing
Quantum information processing is a new and exciting field which uses quantum mechanical systems to perform information processing. At the heart of the excitement are quantum computation - which promises efficient algorithms for simulating physical systems, factoring, and searching unsorted …
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Visible-Light Integrated Photonics for 3D-Printing and Trapped-Ion Systems
Silicon photonics has enabled next-generation optical technologies that have facilitated revolutionary advances for numerous fields spanning science and engineering, including computing, communications, sensing, and quantum engineering. In recent years, the advent of visible-light integrated …
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Integration of Trapped Ion System and Sympathetic Cooling with Multi-isotope Ions
<p>This dissertation addresses challenges in quantum computing with trapped ions, including system integration of the trapped ion hardware, heating-induced decoherence, and efficient cooling mechanisms, by investigating multi-species or isotope ion chains with sympathetic cooling techniques. The …
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Measuring trapped-ion motional decoherence through direct manipulation of motional coherent states
Trapped ions can serve as promising scalable qubits through the excitation of their internal electronic states with lasers to form an effective quantum two-level system, while the ion's quantized motional state in a harmonic potential well allows us to interact neighboring ions via the Coulomb …
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Experiments towards mitigation of motional heating in trapped ion quantum information processing
Trapped ions are a promising candidate for the implementation of quantum information processing. Techniques have already been developed for working with small systems of trapped-ion qubits; scalability is the biggest remaining challenge. One of the major scalability obstacles faced by trapped ions …
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An investigation of precision and scaling issues in nuclear spin and trapped-ion quantum simulators
Quantum simulation offers the possibility of using a controllable quantum-mechanical system to implement the dynamics of another quantum system, performing calculations that are intractable on classical computers for all but the smallest systems. This great possibility carries with it great …
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Spatial Emission and Polarization Control in Integrated Photonics for Optical-Trapping and Trapped-Ion Systems
… including biophotonic optical tweezers and trapped-ion quantum systems. However, the majority of these demonstrations, while offering advantages in size, cost, and dense integration, lag behind their bulk-optic counterparts, limited by a lack of critical advanced functionality such as …
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Integrated-Photonics Devices and Architectures for Advanced Cooling of Trapped Ions
Integrated-photonics-based architectures for trapped-ion systems offer a potential avenue for improved fidelity and addressability of ion arrays. Motional state cooling, a key optical function in trapped-ion systems, however, has been limited to Doppler and resolved-sideband cooling in …
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Motional state engineering for continuous-variable quantum computation
The standard approach to quantum computation uses qubits, which are well-described as a two-level system. An alternative approach to quantum computation is continuous-variable quantum computation (CVQC), which uses physical observables, such as the strength of an electromagnetic field or the …
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PRECISION MEASUREMENT TO STUDY STRONGLY CORRELATED SYSTEMS-FROM A SINGLE ION TO PHONONS IN AN ION CHAIN
Emulation of isolated strongly correlated quantum many-body systems has been a subject of intense experimental and theoretical research in recent years. Trapped ions are well-controlled quantum systems and the ideal choice for studying the strongly correlated systems to unfold the correlated …
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Quantum Error Correction for Physically Inspired Error Models
<p>In this dissertation we will discuss methods for creating error-robust logical qubits which have been optimized for trapped ion quantum computers. We will cover the basic building blocks of quantum information and develop an understanding of the standard techniques for building fault-tolerant …
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