Browsing Physics and Astronomy by Title
Now showing items 246265 of 555

Machine Learning Topological Defects of Liquid Crystals in Two Dimensions
(University of Waterloo, 20190826)Over the recent few years, condensed matter physics has keenly been testing out the compelling techniques from the toolbox of machine learning. Order parameters, phase transitions, and other thermodynamic quantities have ... 
Magnetic Ordering of Dipolar Spin Ice in Moderate [111] Field
(University of Waterloo, 20160908)This thesis explores the low temperature physics of the macroscopically degenerate system of dipolar spin ice in moderate fields applied along the [111] cubic axis. While most applications of field generically lift the ... 
Materials physics of halfmetallic magnetic oxide films by Pulsed Laser Deposition: Controlling the crystal structure and nearsurface properties of Sr2FeMoO6 and CrO2 films
(University of Waterloo, 20090123)The idea of halfmetallic ferromagnets was first introduced by de Groot et al. in 1983 based on their calculations. The density of state at the Fermi level for halfmetallic ferromagnet is completely polarized, meaning ... 
Maximal cell density predictions for compressible polymer foams
(Elsevier, 20121205)Thermodynamic upper bounds for polymer foam cell densities are predicted using compressible selfconsistent field theory. It is found that the incompressible limit always gives the highest, and therefore ultimate, upper ... 
Measuring Entanglement Entropy in Valence Bond Quantum Monte Carlo Simulations
(University of Waterloo, 20101208)In this thesis we examine methods for measuring entanglement entropy in spin1/2 Heisenberg systems using quantum Monte Carlo in the valence bond basis. We begin by presenting the quantum Monte Carlo techniques used in ... 
Measuring NonMarkovianity of Noise in the Cenrtal Spin System
(University of Waterloo, 20190524)In this thesis, we explore nonMarkovian noise in the central spin system due to the coupling between the central spin and the environment. We use a solid state nuclear magnetic resonance system to do the experiment since ... 
Measuring the Environmental Dependence of Galaxy Haloes with Weak Lensing
(University of Waterloo, 20130904)We investigate the uses of gravitational lensing for analysing the dark matter haloes around galaxies, comparing galaxies within groups and clusters to those in the field. We consider two cases: when only photometric ... 
Measuring Trapped Ion Qudits
(University of Waterloo, 20190926)Quantum information has typically focused on using 2level qubits to perform simulation and computation. We propose to expand the number of levels for computation using qudits, where \(d>2\). Doing so could be a viable ... 
MembraneDisrupting Activity of Antimicrobial Peptides and the Electrostatic Bending of Membranes
(University of Waterloo, 20100521)Antimicrobial peptides (AMPs) are not only fast microbekilling molecules deployed in the host defense of living organisms but also offer valuable lessons for developing new therapeutic agents. While the mode of action of ... 
Messier 87: A Laboratory for Exploring AGN Variability using the Event Horizon Telescope
(University of Waterloo, 20200917)At a distance of 50 million light years at the heart of the Virgo cluster, lies the giant elliptical galaxy Messier 87. This galaxy has at its center a brilliant relativistic jet, observable at all wavelengths, and at the ... 
Methods for parallel quantum circuit synthesis, faulttolerant quantum RAM, and quantum state tomography
(University of Waterloo, 20190118)The pace of innovation in quantum information science has recently exploded due to the hope that a quantum computer will be able to solve a multitude of problems that are intractable using classical hardware. Current quantum ... 
A Minimal Model for the Hydrophobic and Hydrogen Bonding Effects on Secondary and Tertiary Structure Formation in Proteins
(University of Waterloo, 20090430)A refinement of a minimal model for protein folding originally proposed by Imamura is presented. The representation of the alphahelix has been improved by adding in explicit modelling of the entire peptide unit. A fourhelix ... 
Minimal model for the secondary structures and conformational conversions in proteins
(University of Waterloo, 2005)Better understanding of protein folding process can provide physical insights on the function of proteins and makes it possible to benefit from genetic information accumulated so far. Protein folding process normally ... 
Mode Invisibility Technique  A Quantum NonDemolition Measurement for Light
(University of Waterloo, 20140714)The act of measuring an observable of a quantum system introduces backaction noise to the measured system. In the most extreme case, the system gets destroyed with its state left unavailable for future measurement. An ... 
Modeling and Simulation of Polarization Mode Dispersion and Polarization Dependent Loss
(University of Waterloo, 20070123)Novel theoretical formulations and efficient simulation methods for polarizationmode dispersion (PMD) and polarizationdependent loss (PDL) that are directly applicable to optical network design are developed. In particular, ... 
Modeling Classical Dynamics and Quantum Effects in Superconducting Circuit Systems
(University of Waterloo, 20150820)In recent years, superconducting circuits have come to the forefront of certain areas of physics. They have shown to be particularly useful in research related to quantum computing and information, as well as fundamental ... 
Modeling Water Emission from Intermediate Mass Star Formation Regions
(University of Waterloo, 20080922)In this research water emission is modeled from intermediate mass star formations regions placed at 1 kpc. Nine models are created to describe these regions of varying source luminosity ($L=100,500,$ and $1000L_{\odot}$) ... 
Modelling Quantum Well Lasers
(University of Waterloo, 2002)In this thesis, two methods to model quantum well lasers will be examined. The first model is based on wellknown techniques to determine some of the spectral and dynamical properties of the laser. For the spectral ... 
Modification of a Dilution Refrigerator for InField SQUID Magnetometry of Dy2Ti2O7
(University of Waterloo, 20151001)The pyrochlore oxide family is a well known class of geometrically frustrated magnets with novel properties such as residual entropy at low temperatures and monopolelike quasiparticle excitations. One member of this ... 
Modified Gravity and the Phantom of Dark Matter
(University of Waterloo, 20090813)Astrophysical data analysis of the weakfield predictions support the claim that modified gravity (MOG) theories provide a selfconsistent, scaleinvariant, universal description of galaxy rotation curves, without the need ...