Browsing Physics and Astronomy by Type "Doctoral Thesis"
Now showing items 2140 of 349

Black Hole Thermodynamics and the Tunnelling Method for Particle Emission
(University of Waterloo, 20080829)The semiclassical black hole tunnelling method is a useful technique to calculate black hole temperature and understand black hole thermodynamics. I will investigate the black hole tunnelling method in detail. I will ... 
Black holes in cosmological spacetimes and alternative theories of gravity
(University of Waterloo, 20230809)This thesis is dedicated to the study of spacetimes surrounding black holes within the context of cosmology, high energy physics and modified theories of gravity. We do this by applying and adapting modern numerical ... 
Bootstrapping Quantum Field Theories
(University of Waterloo, 20240123)This thesis compiles a few developments on the Smatrix bootstrap, conformal field theory, and integrability in N = 4 SYM. After an introduction contextualizing the various works that compose this thesis, we present a ... 
Born Geometry
(University of Waterloo, 20200421)In this thesis, we summarize the work which we authored or coauthored during our PhD studies and also present additional details and ideas that are not found elsewhere. The main topic is the study of Tduality in theoretical ... 
Born Reciprocal Representations of the Quantum Algebra
(University of Waterloo, 20210826)This thesis addresses the representations of the Weyl algebra of quantum mechanics with an explicitly Born reciprocal structure and the dynamics of physical systems in these representations. In this context, we discuss ... 
Bosonic fields in strongfield gravity
(University of Waterloo, 20230719)In this thesis, we investigate bosonic fields in the strongfield and highly dynamical regime of general relativity focusing specifically on the black hole superradiance process of scalar and vector fields, as well as on ... 
Canonical Structure and Conservation Laws of General Relativity on Null Surfaces and at Null Infinity
(University of Waterloo, 20210112)The first part of this thesis addresses the canonical structure of general relativity on generic null surfaces. The presymplectic potential of metric general relativity, evaluated on a null surface, is decomposed into ... 
Carbon nanotube electromechanical systems: Nonlinear dynamics and selfoscillation
(University of Waterloo, 20200513)This thesis is motivated by the many sensing applications of carbon nanotube (CNT) nanoelectromechanical systems (NEMS), both previous stateoftheart demonstrations and proposed new uses. This research is particularly ... 
Causal Models for a Quantum World
(University of Waterloo, 20160518)Quantum mechanics has achieved unparalleled success as an operational theory, describing a wide range of experiments to remarkable accuracy. However, the physical foundations on which it rests remain as puzzling as they ... 
Characterization and Control in Large Hilbert spaces.
(University of Waterloo, 20081203)Computational devices built on and exploiting quantum phenomena have the potential to revolutionize our understanding of computational complexity by being able to solve certain problems faster than the best known classical ... 
Characterization, Veriﬁcation and Control for Large Quantum Systems
(University of Waterloo, 20150331)Quantum information processing offers potential improvements to a wide range of computing endevaors, including cryptography, chemistry simulations and machine learning. The development of practical quantum information ... 
Characterizing Errors in Quantum Information Processors
(University of Waterloo, 20160512)Errorfree computation is an unattainable ideal, yet our world now contains many computers that appear errorfree to their users. That such things are possible is explained by sophisticated theorems that demonstrate the ... 
Charge Density Wave Order in Cuprate Superconductors Studied by Resonant Soft Xray Scattering
(University of Waterloo, 20150422)Cuprate high temperature superconductors have been the subject of intense investigation since their discovery in 1986. The nature of the pairing mechanism in these unconventional superconductors does not seem to be mediated ... 
Circuit Complexity of Mixed States
(University of Waterloo, 20210720)Quantum information has produced fresh insights into foundational questions about the AdS/CFT correspondence. One fascinating concept, which has captured increasing attention, is quantum circuit complexity. As a natural ... 
Classical simulations of quantum systems using stabilizer decompositions
(University of Waterloo, 20210219)One of the state of the art techniques for classically simulating quantum circuits relies on approximating the output state of the circuit by a superposition of stabilizer states. If the number of nonClifford gates in ... 
A Classification of (2+1)D Topological Phases with Symmetries
(University of Waterloo, 20170918)This thesis aims at concluding the classification results for topological phases with symmetry. First, we know that “trivial” (i.e., not topological) phases with symmetry can be classified by Landau symmetry breaking ... 
Classifications of Quantum Field Theories
(University of Waterloo, 20180704)We discuss classifications of UV complete supersymmetric theories in six dimensions, and (spin)topological field theories admitting a finite global symmetry and possibly timereversal symmetry in three dimensions. We also ... 
Coherent control of nuclear and electron spins for quantum information processing
(University of Waterloo, 20150810)The ability to perform quantum error correction (QEC) arbitrarily many cycles is a significant challenge for scalable quantum information processing (QIP). Key requirements for multipleround QEC are a high degree of quantum ... 
Collective Dynamics in NMR and Quantum Noise
(University of Waterloo, 20161017)We introduced an open quantum system model to describe the statistical fluctuations of a spin ensemble in NMR. The model considers an ensemble measurement where the detection coil does not distinguish spins, and accounts ... 
Collective SpinCavity Ensembles and the Protection of Higherdimensional Quantum Information
(University of Waterloo, 20220928)The development of devices leveraging their quantum nature to outperform classical analogues has been an ongoing effort for many decades now. In this thesis we investigate two facets related to this effort, albeit at ...