Physics and Astronomy: Recent submissions
Now showing items 120 of 553

Towards simulating 2D effects in lattice gauge theories on a quantum computer
(University of Waterloo, 20201026)Quantum Field Theories (QFTs) are the most successful theories for describing nature at its most fundamental level. Despite the fact that QFTs are capable of predicting a wide range of phenomena, obtaining solutions to ... 
Experimental and theoretical investigations of radiofrequency and optical trapping potentials for atomic ions
(University of Waterloo, 20201008)Over the years, trapped ion have emerged as one of the premier candidates for universal quantum simulation due to its long coherence time, low initialization and detection errors, robust highfidelity gate sets and fully ... 
The SMatrix of Gauge and Gravity Theories and The TwoBlack Hole Problem
(University of Waterloo, 20201001)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 ... 
Quantum Black Holes in the Sky
(University of Waterloo, 20200930)Black Holes are possibly the most enigmatic objects in our Universe. From their detection in gravitational waves upon their mergers, to their snapshot eating at the centres of galaxies, black hole astrophysics has undergone ... 
Unifying Thermal Big Bang and Black Holes
(University of Waterloo, 20200930)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 ... 
A Study of Electronic Nematicity in Cuprate Superconductors using Resonant Soft XRay Scattering
(University of Waterloo, 20200929)The cuprate hightemperature superconductors involve a complex interplay between different structural and electronic symmetrybreaking phases. In the last decade, rotational and translational symmetrybreaking phases — ... 
SolventInduced Nanoscopic Surface Morphology on Polymer Thin Films
(University of Waterloo, 20200929)Polymer thin films are studied extensively due to their important applications in the fields of material coatings, biomedical devices, nanoelectronics, and more. Many of these applications directly depend on the surface ... 
Towards Practical Hybrid Quantum / Classical Computing
(University of Waterloo, 20200928)Quantum computing is in a critical phase where theoretical schemes and protocols are now being implemented in the real world for the first time. Experimental implementations can help us solidify ideas, and can also complicate ... 
The Shape of Dark Matter Haloes: Results from Weak Lensing
(University of Waterloo, 20200925)Dark matter haloes are expected to have a triaxial shape, appearing elliptical in projection. Understanding the orientation of these dark matter haloes, and how they are aligned, has implications for theories of structure ... 
Nonlinear Behavior of Unstable Black Holes in Antide Sitter Spacetimes
(University of Waterloo, 20200925)The nonlinear dynamics of black holes is an increasingly relevant topic of which little is known. In this thesis, we study the full nonlinear dynamics of black holes, as well as their linear behavior, and combine them ... 
Vacuum and Optical Designs for an Openaccess Trapped Ion Quantum Processor
(University of Waterloo, 20200921)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 ... 
Studies of Reentrance in Pyrochlore Magnets and Machine Learning of Quenched Gauge Symmetries
(University of Waterloo, 20200918)In this thesis, we present two explorations: (1) understanding the mechanism causing reentrant behavior in the rareearth pyrochlore magnet Er2Sn2O7, and (2) determining if unsupervised machine learning is capable of ... 
Emergent Fields, Flat Bands and Phase Competition: A Study in Magnetic Pyrochlore Systems
(University of Waterloo, 20200918)We investigate spins models on the pyrochlore and the breathing pyrochlore lattice. Specifically, we study polarized neutron scattering in classical spin ice modelled via Ising spins with antiferromagnetic interactions. ... 
Generalized holographic dualities for metric gravity & Quantum geometry based on area variables
(University of Waterloo, 20200918)Holography holds promise for simplifying computations in quantum gravity. In part I of this thesis, we construct holographic boundary theories for linearized gravity, for a general family of finite or quasilocal boundaries, ... 
Application of the FlagState Squashing Model to Numerical Quantum Key Distribution Security Analysis
(University of Waterloo, 20200918)The squashing model proof technique is a powerful tool in proving security of quantum key distribution (QKD) protocols since it reduces the dimension of the associated computational problem from infinite to finite. In the ... 
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 ... 
Interpolated Collision Model Formalism
(University of Waterloo, 20200916)The dynamics of open quantum systems (i.e., of quantum systems interacting with an uncontrolled environment) forms the basis of numerous active areas of research from quantum thermodynamics to quantum computing. One approach ... 
Tunable Coupler in Superconducting Circuits and Impedance Engineering for Josephson Parametric Amplifier
(University of Waterloo, 20200904)In this thesis, we study two topics on superconducting circuits. The first topic is the tunable coupler for resonators. This coupler is implemented with a superconducting circuit coupling with resonators in the dispersive ... 
Optimization of MBE growth of a highquality 2Dimensional Electron Gas in InAs/AlGaSb material system for pursuing a topdown approach towards realization of topological qubits.
(University of Waterloo, 20200904)Twodimensional electron gas (2DEG) in InAs quantum wells grown on nearly latticematched GaSb substrates is an ideal platform towards the realization of topological quantum computing with Majorana fermions, due to its low ... 
Toward standardization of Quantum Key Distribution
(University of Waterloo, 20200903)Information security becomes an inseparable part of our everyday life. An encryption method widely used today is publickey encryption. The security of this method is based on a hard to solve mathematical problems against ...