Browsing by Subject "Quantum physics"
Now showing items 120 of 32

A Compact Cryogenic Package Approach to Ion Trap Quantum Computing
(2022)Ion traps are a leading candidate for scaling quantum computers. The component technologies can be difficult to integrate and manufacture. Experimental systems are also subject to mechanical drift creating a large maintenance ... 
Alternative Tests of Quarkonium Production Theory Using Jets
(2017)In this thesis I discuss an alternative approach for investigating quarkonium production in hadron colliders. I present a complete framework for developing observables for studies of charmonium states produced within a jet. ... 
Analytical and Numerical Study of Lindblad Equations
(2020)Lindblad equations, since introduced in 1976 by Lindblad, and by Gorini, Kossakowski, and Sudarshan, have received much attention in many areas of scientific research. Around the past fifty years, many properties and structures ... 
Characterizing and Mitigating Errors in Quantum Computers
(2023)This thesis aims to present methods for characterizing and mitigating errors in quantum computers. We begin by providing a historical overview of computing devices and the evolution of quantum information. The basics of ... 
Classical Coding Approaches to Quantum Applications
(2020)Quantum information science strives to leverage the quantummechanical nature of our universe in order to achieve large improvements in certain information processing tasks. Such tasks include quantum communications and ... 
Designing Quantum Channels Induced by Diagonal Gates
(2023)The challenge of quantum computing is to combine error resilience with universal computation. Diagonal gates such as the transversal T gate play an important role in implementing a universal set of quantum operations. We ... 
Dynamics of Open Quantum Systems: Measurement, Entanglement, and Criticality
(2020)Open quantum systems refer to quantum systems that couple with their surrounding environment. They are ubiquitous, especially for quantum devices. Due to coupling with the external environment, the dynamics of open quantum ... 
Eigenstate Entanglement Scaling and Quantum Simulation of Manybody Systems by Entanglement Renormalization
(2022)Quantum entanglement lies at the heart of modern physics and pervades various research fields. In the field of quantum manybody physics, celebrated area and logarea laws have been established for the entanglement entropy ... 
Enabling Technologies for HighRate, FreeSpace Quantum Communication
(2019)Quantum communication protocols, such as quantum key distribution (QKD), are practically important in the dawning of a new quantum information age where quantum computers can perform efficient prime factorization to render ... 
Exploring Quantum Field Theories with Qubit Lattice Models
(2020)The framework of quantum field theory (QFT) underlies our modern understanding of both particle physics and condensed matter physics. Despite its importance, precise quantitative calculations in stronglycoupled theories ... 
Fast, Nondestructive Quantumstate Readout of a Single, Trapped, Neutral Atom
(2018)Experimental systems that trap single, neutral atoms have recently emerged as a promising platform for experiments in a range of disciplines such as quantum information science, quantum simulation and fundamental lightatom ... 
FaultTolerant Quantum Measurement of Error Syndromes and Logical Operators
(2023)Faulttolerant quantum computation requires the measurements of error syndromes and logical operators in a way that minimizes undesired correlated errors on the quantum data. This thesis explores possible forms for performing ... 
High Fidelity Single Qubit Manipulation in a Microfabricated Ion Trap
(2015)The trapped atomic ion qubits feature desirable properties for use in a quantum computer such as long coherence times, high qubit readout fidelity, and universal logic gates. While these essential properties have ... 
Highrate, highdimensional quantum key distribution systems
(2018)There is currently a great interest in using highdimensional (dimension d>2) quantum states for various communication and computational tasks. Highdimensional quantum states provide an efficient and robust means of encoding ... 
Improving Circuit Performance in a TrappedIon Quantum Computer
(2021)A quantum circuit is a widely used model for quantum computation. It consists of quantum registers, which we refer to as qubits, and quantum gates. To build a largescale trapped ion quantum computer, the performance of ... 
Improving Scalability of TrappedIon Quantum Computers Using GateLevel Techniques
(2023)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 ... 
Integration of Trapped Ion System and Sympathetic Cooling with Multiisotope Ions
(2023)This dissertation addresses challenges in quantum computing with trapped ions, including system integration of the trapped ion hardware, heatinginduced decoherence, and efficient cooling mechanisms, by investigating ... 
Interacting Photons in WaveguideQED and Applications in Quantum Information Processing
(2013)Strong coupling between light and matter has been demonstrated both in classicalcavity quantum electrodynamics (QED) systems and in more recent circuitQEDexperiments. This enables the generation of strong nonlinear photonphoton ... 
Investigating the Ground States of Triangular Antiferromagnet Quantum Spin Liquid Candidates
(2021)The pursuit of the quantum spin liquid (QSL) state has been at the fore of condensed matter physics for several decades. In this exotic state of matter, spins remain dynamic in the zero temperature limit while retaining ... 
Locally Adaptive Protocols for Quantum State Discrimination
(2021)This dissertation makes contributions to two rapidly developing fields: quantum information theory and machine learning. It has recently been demonstrated that reinforcement learning is an effective tool for a wide variety ...