Browsing Physics and Astronomy by Title
Now showing items 15-34 of 769
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An alternative derivation of orbital-free density functional theory
(AIP, 2019-05-28)Polymer self-consistent field theory techniques are used to derive quantum density functional theory without the use of the theorems of density functional theory. Instead, a free energy is obtained from a partition function ... -
Aluminium-Palladium Transition Edge Sensors
(University of Waterloo, 2008-09-15)A superconducting Transition Edge Sensor (TES) can be used to make the most sensitive thermometer which operates in a very narrow temperature range. The thin film bi-layer fabrication details are discussed as well as ... -
Amended Model of Large Scale Dark Matter Structure
(University of Waterloo, 2020-09-03)Dark matter makes up around a quarter of the total energy density in the universe, but its identity remains elusive. Current ways of studying dark matter have centered around its macroscopic properties, such as density ... -
Amplitudes in the Spin Foam Approach to Quantum Gravity
(University of Waterloo, 2017-07-31)In this thesis, we study a Spin Foam model for 4D Riemannian quantum gravity, and propose a new way of imposing the simplicity constraints that uses the recently developed holomorphic representation. Rather than imposing ... -
Analysis of the Thermal Fisher Information in 2+1 Dimensional Black Hole Spacetimes
(University of Waterloo, 2023-01-24)In the past decade, relativistic quantum information (RQI) has presented itself as a promising avenue for examining the interaction between relativistic and quantum effects. This is most commonly achieved by coupling ... -
Analytical and Numerical Studies of 2D XY Models with Ring Exchange
(University of Waterloo, 2012-08-31)In this thesis we take several different analytic and numerical approaches to studying the classical J-K model. This model describes an interacting many-body system of spins with continuous symmetry which interact via ... -
An apparatus for studying interactions between Rydberg atoms and metal surfaces
(University of Waterloo, 2007-09-27)A system suitable for studying interactions between ⁸⁷Rb Rydberg atoms and metal surfaces has been constructed. This thesis describes the design and construction of the apparatus, and some test results. Atoms in a vapor ... -
Application of a constant hole volume Sanchez–Lacombe equation of state to mixtures relevant to polymeric foaming
(Royal Society of Chemistry, 2018)A variant of the Sanchez–Lacombe equation of state is applied to several polymers, blowing agents, and saturated mixtures of interest to the polymer foaming industry. These are low-density polyethylene– carbon dioxide and ... -
Application of the Flag-State Squashing Model to Numerical Quantum Key Distribution Security Analysis
(University of Waterloo, 2020-09-18)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 ... -
Applications of Adiabatic Approximation to One- and Two-electron Phenomena in Strong Laser Fields
(University of Waterloo, 2010-12-20)The adiabatic approximation is a natural approach for the description of phenomena induced by low frequency laser radiation because the ratio of the laser frequency to the characteristic frequency of an atom or a molecule ... -
Applications of Entanglement and Nonlocality
(University of Waterloo, 2021-09-20)Entanglement and nonlocality are two of the features demonstrated by quantum systems which give rise to new possibilities in a variety of fields such as communication technology, cryptography and the study of fundamental ... -
Applications of Raman Spectroscopy
(University of Waterloo, 2014-08-22)This thesis is devoted to exploring experimental applications of Raman spectroscopy. The ability of Raman spectroscopy to investigate the vibrational modes of a molecule was explored in several studies. The work included ... -
Applications of the Quantum Kernel Method on a Superconducting Quantum Processor
(University of Waterloo, 2020-05-29)The widespread benefits of classical machine learning along with promised speedups by quantum algorithms over their best performing classical counterparts have motivated development of quantum machine learning algorithms ... -
Applications of the Wormlike Chain Model in Polymer Physics: Self-consistent Field Theory
(University of Waterloo, 2013-04-30)The self-consistent field theory (SCFT) has reveived a great success in prediction of the physical properties of a variety of polymeric systems in the recent two decades. However, the traditional SCFT is based on the ... -
Aspects of Anomaly in Condensed Matter Physics
(University of Waterloo, 2023-05-30)Anomalies have proven to be an important tool for unraveling the enigmatic properties of strongly-coupled condensed matter systems. Especially, it provides powerful constraints on the emergibility problem, i.e., whether a ... -
Aspects of Nonlocality: from Particles to Black Holes
(University of Waterloo, 2016-05-06)This dissertation is a collection of works on different aspects of the following subjects: causal set--continuum correspondence, wave propagation on causal sets, nonlocal quantum field theory, potential connection between ... -
Aspects of Quantum Field Theory with Boundary Conditions
(University of Waterloo, 2019-08-02)This thesis has two modest goals. The primary goal is to deliver three results involving particle detectors interacting with a quantum field in presence of non-trivial boundary conditions (Dirichlet, Neumann, periodic; ... -
Aspects of Quantum Information and AdS/CFT Duality
(University of Waterloo, 2021-05-17)This thesis considers four different aspects of quantum information, AdS/CFT duality, and the interplay between them. First, we study the holographic complexity conjectures in detail for rotating black holes. We focus ... -
Aspects of Scattering Amplitudes and Moduli Space Localization
(University of Waterloo, 2019-08-19)We propose that intersection numbers of certain cohomology classes on the moduli space of genus-zero Riemann surfaces with $n$ punctures, $\mathcal{M}_{0,n}$, compute tree-level scattering amplitudes in quantum field ... -
Assessing the Accuracy of Cosmological Parameters Estimated from Velocity – Density Comparisons
(University of Waterloo, 2024-01-10)A promising method for measuring the cosmological parameter combination fσ₈ is to compare observed peculiar velocities with peculiar velocities predicted from a galaxy density field using linear perturbation theory, known ...