Browsing Physics and Astronomy by Title
Now showing items 450-469 of 767
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Optimization of the Optical Infrastructure and Trapping Potential for a Quantum Processor Based on Trapped Barium Ions
(University of Waterloo, 2024-02-02)Trapped ion quantum computers represent a cutting-edge quantum computing platform, keeping the highest reported state preparation and measurement fidelity of 99.97%. Recently, barium ion has emerged as the research ... -
Optimizing Small-scale Redshift Space Distortion Measurements in eBOSS for Cosmological Inference
(University of Waterloo, 2023-09-21)Modern cosmological datasets have grown substantially in size and the precision of their measurements. While the improvement has had a beneficial impact on our understanding of the cosmological model, it requires equal ... -
Ordering and Reverse Ordering Mechanisms of Triblock Copolymers in the Presence of Solvent
(MDPI, 2009-02-27)Self-consistent field theory is used to study the self-assembly of a triblock copolymer melt. Two different external factors (temperature and solvent) are shown to affect the self-assembly. Either one or two-step self-assembly ... -
Ordering mechanisms in triblock copolymers
(American Physical Society, 2004)The ordering mechanisms for an ABC triblock copolymer system are studied using self-consistent field theory. We find a two-phase mechanism, similar to what has been suggested experimentally two-step mecha- nism. Analysis ... -
Orientation and Transitions of Lyotropic Lamellar Phase under Shear
(University of Waterloo, 2014-01-24)The intention of this study is to investigate the evolution and transition of lyotropic lamellar phase and the formation of multi-lamellar vesicles (MLVs) under shear flow, since the shear technology can be used to produce ... -
Origin of change in molecular-weight dependence for polymer surface tension
(APS publishing, 2008-09-30)Self-consistent-field theory is used to reproduce the behavior of polymer surface tension with molecular-weight for both lower and higher molecular-weight polymers. The change in behavior of the surface tension between ... -
Origin of NMR Spectral Features in MCM-41 at Low Hydrations
(University of Waterloo, 2010-09-01)Although extensive literature exists on NMR of water in MCM-41, the origin of a number of NMR spectral features in this material had not been understood. Specifically, the OH proton resonance observed in the dry material ... -
Origins of Elastic Properties in Ordered Block Copolymer/Nanoparticle Composites
(American Chemical Society, 2004)We predict a diblock copolymer melt in the lamellar phase with added spherical nanoparticles that have an affinity for one block to have a lower tensile modulus than a pure diblock copolymer system. This weakening is due ... -
Origins of the failure of classical nucleation theory for nanocellular polymer foams
(RSC publishing, 2011-07-06)Relative nucleation rates for fluid bubbles of nanometre dimensions in polymer matrices are calculated using both classical nucleation theory and self-consistent field theory. An identical model is used for both calculations ... -
Parallelizing quantum circuit synthesis
(University of Waterloo, 2015-04-24)We present an algorithmic framework for parallel quantum circuit synthesis using meet-in-the-middle synthesis techniques. We also present two implementations thereof, using both threaded and hybrid parallelization ... -
Particle Distributions in a Block Copolymer Nanocomposite
(American Chemical Society, 2008)Self-consistent-field theory is used to predict the center-of-mass distribution of spherical nanoparticles embedded in the lamellar phase of a diblock copolymer melt. The calculation is performed in the dilute limit, where ... -
Path integral Langevin dynamics of complex molecular systems: from low-temperature quantum clusters to biomolecules
(University of Waterloo, 2011-08-31)This thesis presents an implementation of path integral molecular dynamics (PIMD) for sampling equilibrium and dynamical properties within the molecular modelling toolkit (MMTK) [J. Comp. Chem. 21, 79 (2000)], an open ... -
Path Integrals in the Sky: Classical and Quantum Problems with Minimal Assumptions
(University of Waterloo, 2019-10-24)Cosmology has, after the formulation of general relativity, been transformed from a branch of philosophy into an active field in physics. Notwithstanding the significant improvements in our understanding of our Universe, ... -
Peculiar Velocities and Large Scale Flows as Probes of Gravity, ΛCDM and the Growth of Structure over Cosmic Time
(University of Waterloo, 2012-09-28)Peculiar velocities are possibly the most powerful probes of very large-scale mass density fluctuations in the nearby Universe. When coupled with a density field they also can constrain the growth factor of the universe ... -
Periodically-driven quantum many-body systems, many-body localization and machine learning
(University of Waterloo, 2018-03-09)Despite the exponentially large amount of information required in the quantum description of many-body systems, finite size numerical simulations have paved the way for recent progress in the understanding of quantum phases ... -
Perspectives on the Formalism of Quantum Theory
(University of Waterloo, 2012-09-26)Quantum theory has the distinction among physical theories of currently underpinning most of modern physics, while remaining essentially mysterious, with no general agreement about the nature of its principles or the ... -
Photon Rings and Shadow Size for General Integrable Spacetimes
(University of Waterloo, 2023-08-08)According to the no-hair theorem, the unique characteristics of astrophysical black holes are their masses and spins. However, recent observations from the Event Horizon Telescope (EHT) images of M87 and Sgr A* have ... -
Photonic Three-Level Systems Within the Framework of Generalised Probabilistic Theories
(University of Waterloo, 2021-09-24)If one seeks to test quantum theory not against a particular alternative but against many alternatives in a landscape of possibilities, it is crucial to be able to analyze experimental data in a theory-agnostic way. This ... -
Photons & Phonons: A room-temperature diamond quantum memory
(University of Waterloo, 2016-08-19)This thesis presents demonstrations of the storage and manipulation of single photons in a room-temperature diamond quantum memory using a Raman memory protocol. We report on results from four experiments. In the first ... -
Physical Model for Cell Selectivity of Antimicrobial Peptides
(University of Waterloo, 2013-06-20)Antimicrobial peptides (AMPs) are relatively-short chain molecules that living organisms use to defend themselves against a wide range of invading microorganisms such as bacteria and viruses. They selectively bind to and ...