Browsing Physics and Astronomy by Title
Now showing items 555-574 of 767
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Resources Needed for Entangling Two Qubits through an Intermediate Mesoscopic System
(University of Waterloo, 2019-09-23)One of the main challenges in designing large scale quantum processors is connecting separated qubits. In this thesis, we explore new opportunities that mesoscopic many-body systems provide for creating quantum correlation ... -
RF-QPC Charge Detector and S-T₊ Qubit in a Lateral Double Quantum Dot Device
(University of Waterloo, 2017-01-18)A measurement system is developed for studying a lateral double quantum dot (DQD) device formed in the two-dimensional electron gas (2DEG) of a GaAs/AlGaAs heterostructure. Copper powder and RC filters are constructed to ... -
Rigid Quasilocal Frames
(University of Waterloo, 2014-01-23)This thesis begins by introducing the concept of a rigid quasilocal frame (RQF) as a geometrically natural way to define an extended system in the context of the dynamical spacetime of general relativity. An RQF is defined ... -
Ring Resonator Photonic Sensing Device
(University of Waterloo, 2015-02-20)This thesis studies a micro ring resonator sensor structure built using the silicon-on-insulator (SOI) platform. The sensor detects changes in index of refraction with a sensitivity of 21 nm/RIU (RIU stands for refractive ... -
Ring Resonators for Integrated Optics Applications
(University of Waterloo, 2012-01-03)Integrated ring resonators have attracted a considerable interest in optical communications because of their small size and wide range of applicability. Here we consider several aspects of these devices, beginning with a ... -
A ring-polymer model shows how macromolecular crowding controls chromosome-arm organization in Escherichia coli
(Nature Publishing Group, 2017-09-19)Macromolecular crowding influences various cellular processes such as macromolecular association and transcription, and is a key determinant of chromosome organization in bacteria. The entropy of crowders favors compaction ... -
Risk associated with H2S evolution in sour aquifers during CO2 injection
(Elsevier, 2011)Many aquifers suitable for CO2 sequestration contain measurable concentration of dissolved non-hydrocarbon species. In this paper, the compositional modelling of the CO2 injection into aquifers that contain dissolved ... -
Robust Optical Engineering for a Trapped Ion Quantum Computer
(University of Waterloo, 2022-09-02)Trapped ions are one of the leading platforms for the implementation of quantum information processing (QIP), exhibiting one of the highest reported quantum gate and measurement fidelities. The challenge for the platform ... -
Robust Time-Optimal Control for the One-Dimensional Optical Lattice for Quantum Computation
(University of Waterloo, 2011-10-04)Quantum information is a growing field showing exciting possibilities for computational speed-up and communications. For the successful implementation of quantum computers, high-precision control is required to reach ... -
The Role of Melatonin in Amyloid Interactions with the Model Neuronal Membranes
(University of Waterloo, 2023-11-29)The amyloid cascade hypothesis has long directed research efforts in understanding the pathogenesis of Alzheimer’s disease (AD), ever since it was first proposed through clinical evidence by Hardy and Higgins in 1992. ... -
The Role of the Group Environment in Galaxy Evolution
(University of Waterloo, 2010-08-11)The majority of typically sized galaxies in the local Universe reside in a common dark matter halo with other similar galaxies known as a galaxy group. However, this was not always the case. Nine billion years ago, when ... -
The Roles of Causal Propagator in Relativistic Quantum Information
(University of Waterloo, 2023-05-29)This thesis focuses on the roles of causal propagator — the expectation value of the field commutator — in relativistic quantum information. Consider two observers Alice and Bob, each carrying a two-level quantum system ... -
The S-Matrix of Gauge and Gravity Theories and The Two-Black Hole Problem
(University of Waterloo, 2020-10-01)This thesis is devoted to diverse aspects of scattering amplitudes in gauge theory and gravity including interactions with matter particles. In Part I we focus on the applications of massive scattering amplitudes in gravity ... -
Satellite Dynamics in Dark Matter Halos
(University of Waterloo, 2010-09-01)I have used an analytic model of tidal interactions to predict the evolution of a substructure in a static dark matter halo. Given the initial conditions of the satellite and background halo, the model predicts with high ... -
Scattering Equations and S-Matrices
(University of Waterloo, 2015-06-25)We introduce a new formulation for the tree-level S-matrix in theories of massless particles. Sitting at the core of this formulation are the scattering equations, which yield a map from the kinematics of a scattering ... -
A Search for Nearby Dwarf Galaxies
(University of Waterloo, 2014-09-25)Dwarf galaxies can be used to trace invisible dark matter substructure. Studies of the properties of dwarf galaxy populations are crucial in solving the so-called ``Missing Satellite Problem'', and hold important implications ... -
Searching for the Magnetic Interactions in the Rare Earth Pyrochlore Oxide Yb₂Ti₂O₇
(University of Waterloo, 2011-07-20)Various experiments on Yb₂Ti₂O₇ have shown evidence of strange magnetic behaviour at low temperatures. Specific heat measurements on powder samples of Yb₂Ti₂O₇ show evidence of a sharp peak, indicating the occurence of a ... -
Security Analysis of Quantum Key Distribution: Methods and Applications
(University of Waterloo, 2021-09-27)Quantum key distribution (QKD) can be proved to be secure by laws of quantum mechanics. In this thesis, we review security proof methods in Renner's framework and discuss numerical methods to calculate asymptotic and finite ... -
The Security of Simplified Trusted Relays
(University of Waterloo, 2014-08-27)This thesis examines the security of performing quantum key distribution (QKD) with a simplified trusted relay (STR). The protocol carries out the quantum phase of a conventional trusted relay, however, reduces the required ... -
Security proof methods for quantum key distribution protocols
(University of Waterloo, 2013-04-26)In this thesis we develop practical tools for quantum key distribution (QKD) security proofs. We apply the tools to provide security proofs for several protocols, ranging from discrete variable protocols in high dimensions, ...