Browsing Physics and Astronomy by Title
Now showing items 748-767 of 770
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An Ultrafast Source of Polarization Entangled Photon Pairs based on a Sagnac Interferometer
(University of Waterloo, 2009-01-26)This thesis describes the design, development, and implementation of a pulsed source of polarization-entangled photons using spontaneous parametric down-conversion in a Sagnac interferometer. A tangle of 0.9286 ± 0.0015, ... -
Ultrahigh Resolution Optical Coherence Tomography for Non-invasive Imaging of Outer Retina Degeneration in Rat Retina
(University of Waterloo, 2013-02-22)This project initiated with the aim for improving the ultrahigh resolution optical coherence tomography (UHR-OCT) system performance by considering the limitations to the axial OCT resolution for in vivo imaging of human ... -
Ultraviolet Sizes and Morphology of Galaxies in the Coma Cluster
(University of Waterloo, 2022-08-25)We present a study of the Coma cluster using ultraviolet (UV) imaging obtained using the Ultraviolet Imaging Telescope. We discuss methods for measuring sizes and morphology of galaxies in the UV. Several cluster galaxies ... -
Understanding Polarization Distortions for Real-world Quantum Key Distribution
(University of Waterloo, 2020-05-15)The field of quantum key distribution (QKD) has seen many advancements since its conception in 1984. Recently there have been developments towards establishing free space optical links between satellites and earth to enable ... -
Understanding sequential measurements in psi-epistemic ontological models
(University of Waterloo, 2019-08-06)Since the famous debates of Einstein & Bohr, physicists have argued about the nature of the quantum state. Is it best thought of as describing the-way-things-are out there in the world, or merely as a description of our ... -
Unifying Thermal Big Bang and Black Holes
(University of Waterloo, 2020-09-30)Theories that stand the test of constant bombardment of new (and old) ideas, observations and unexplained phenomena are hard to come by. Despite countless attempts over many years of trying, cosmology and gravitational ... -
Universal Control in 1e-2n Spin System Utilizing Anisotropic Hyperfine Interactions
(University of Waterloo, 2010-09-30)ESR quantum computing presents faster means to perform gates on nuclear spins than the traditional NMR methods. This means ESR is a test-bed that can potentially be useful in ways that are not possible with NMR. The first ... -
Universal formula for the holographic speed of sound
(Elsevier, 2018-06-10)We consider planar hairy black holes in five dimensions with a real scalar field in the Breitenlohner–Freedman window and derive a universal formula for the holographic speed of sound for any mixed boundary conditions of ... -
The Unruh-DeWitt Detector Model: Modified Dispersion and Nonlinear Couplings
(University of Waterloo, 2021-09-30)In this work, we employ the Unruh-DeWitt (UDW) detector model to various ends. We present applications of this relativistic detector model to quantum optics, including decoherence in optical cavities and non-linear quantum ... -
Unruh-DeWitt detector response along static and circular-geodesic trajectories for Schwarzschild-AdS black holes
(University of Waterloo, 2014-08-26)We present novel methods to numerically address the problem of characterizing the response of particle detectors in curved spacetimes. These methods allow for the integration of the Wightman function, at least in principle, ... -
Using Black Hole Environments as Laboratories for Testing Accretion and Gravity
(University of Waterloo, 2023-08-29)With the advent of the Event Horizon Telescope (EHT), we have the ability to observe the lensed emission from hot plasmas near event horizons. It contains entangled information about the turbulent magnetohydrodynamic ... -
Vacuum and Optical Designs for an Open-access Trapped Ion Quantum Processor
(University of Waterloo, 2020-09-21)This thesis focuses on the design of a vacuum system for a trapped ion quantum computer that will house an advanced ion chip trap from Sandia National Laboratories, capable of performing high fidelity operations on up to ... -
Variational Quantum Eigensolvers Applied to Problems in High Energy Physics
(University of Waterloo, 2021-01-13)Variational methods have long been used to study strongly-correlated quantum systems. Despite the successes of classical protocols, these are limited in the study of quantum systems, either due to numerical errors like the ... -
The Vertex Algebra Vertex
(University of Waterloo, 2019-07-19)This thesis reviews some aspects of a large class of vertex operator algebras labelled by $(p,q)$ webs colored by non-negative integers associated to faces of the web diagrams [1,2,3,4]. Such vertex operator algebras ... -
Violation of an augmented set of Leggett-Garg inequalities and the implementation of a continuous in time velocity measurement
(University of Waterloo, 2019-07-11)Macroscopic realism (MR) is the view that a system may possess definite properties at any time independent of past or future measurements, and may be tested experimentally using the Leggett-Garg inequalities (LGIs). In ... -
Virtues of the Visible; Voluminous Vistas & Velocities
(University of Waterloo, 2014-08-11)Peculiar velocities are the motions of objects in excess of that resulting from the expansion of the Universe. They arise from gravitational interactions, and as such, probe the underlying distribution of dark matter on ... -
Wavefront assessment and correction of the rat eye for two photon excitation therapies
(University of Waterloo, 2016-08-31)Photodynamic therapy (PDT) is a treatment in which light excites a photosensitive drug to produce oxygen radicals that kills nearby cells. Today, PDT’s is most commonly used application is for the destruction of cancerous ... -
Waveguide Sources of Photon Pairs
(University of Waterloo, 2011-05-04)This thesis describes various methods for producing photon pairs from waveguides. It covers relevant topics such as waveguide coupling and phase matching, along with the relevant measurement techniques used to infer photon ... -
Weak Coherent Pulse Source and Polarization Control for Quantum Key Distribution
(University of Waterloo, 2023-05-30)The Quantum EncrYption and Science Satellite will demonstrate quantum communication from space. One demonstration will be a satellite uplink using a weak coherent pulse source. This thesis will discuss work in minimizing ... -
What can detectors detect?
(University of Waterloo, 2021-01-29)This thesis is focused on using a pair of Unruh-DeWitt detectors, which interact locally with a quantum field, to gain information about properties of the field and the underlying spacetime. First, we consider a massless ...