Browsing by Subject "Quantum physics"
Now showing items 120 of 22

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 ... 
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 ... 
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 ... 
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 ... 
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 ... 
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 ... 
Manipulation of Nonlinear Optical Processes in Plasmonic Nanogap Cavities
(2020)Nonlinear generation of optical fields has enabled many exciting breakthroughs in light science such as nonlinear imaging, alloptical switching and supercontinuum generation. The intrinsic nonlinear response from bulk materials ... 
Microfabricated Surface Trap and Cavity Integration for Trapped Ion Quantum Computing
(2016)Atomic ions trapped in microfabricated surface traps can be utilized as a physical platform with which to build a quantum computer. They possess many of the desirable characteristics of such a device, including high fidelity ... 
Optical Control of Magnetic Feshbach Resonances by ClosedChannel Electromagnetically Induced Transparency
(2016)Optical control of interactions in ultracold gases opens new fields of research by creating ``designer" interactions with high spatial and temporal resolution. However, previous optical methods using single optical fields ... 
Quantum Critical Phenomena of Relativistic Fermions in 1+1d and 2+1d
(2022)In this dissertation, we study the phase structures and the quantum critical phenomena of relativistic lattice fermions with $\O(2N_f)$ symmetry in one and two spatial dimensions, motivated by the ability to perform efficient ... 
Quantum Error Correction for Physically Inspired Error Models
(2021)In this dissertation we will discuss methods for creating errorrobust logical qubits which have been optimized for trapped ion quantum computers. We will cover the basic building blocks of quantum information and develop ... 
Robust Ion Trap Quantum Computation Enabled by Quantum Control
(2020)The advent of quantum computation foretells a new era in science and technology, but the fragility of quantum bits (qubits) and the unreliability of gates hinder the realization of functioning quantum computers. For ion ...