Physics and Astronomy: Recent submissions
Now showing items 41-60 of 767
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Near-Term Quantum Algorithms for Classical Sampling
(University of Waterloo, 2023-08-14)In the current era of noisy intermediate-scale quantum devices, quantum sampling algorithms have been of great interest as they permit errors in their execution while maintaining their advantage over classical counterparts ... -
Exotic Circuits for Enhanced Quantum Algorithms and Computation
(University of Waterloo, 2023-08-09)Quantum circuits play an essential role in many disciplines of quantum information science. They can not only be represented in the traditional gate-based paradigm, but also an alternative measurement-based paradigm. The ... -
Black holes in cosmological spacetimes and alternative theories of gravity
(University of Waterloo, 2023-08-09)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 ... -
Chaos and dynamical instability in a closed kicked system
(University of Waterloo, 2023-08-08)Quantum-classical correspondence plays an important role in understanding the emergence of classical chaos from underlying quantum mechanics. However, the transition from quantum to classical is not straightforward. Here ... -
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 ... -
Interactions, Entanglement, and Anomalies in Topological Semimetals
(University of Waterloo, 2023-08-04)Topology and symmetry have become one of the backbones of modern condensed matter physics. These concepts play a large role in determining the possible effects of interactions and entanglement in both gapped and gapless ... -
Precision Cosmology Using Voids
(University of Waterloo, 2023-08-04)In the late 1990s, the discovery that the expansion rate of the Universe was accelerating was a decisive moment for cosmology. The last 25 years have seen the consolidation of this component, called dark energy, which ... -
A Purity Benchmarking Study of Superconducting Single-qubit Fluctuations
(University of Waterloo, 2023-07-31)Quantum processes are susceptible to errors. Over the years, numerous noise models, such as two-level system noise and flux noise, have been proposed by physicists to describe the mechanisms behind the error sources ... -
Bosonic fields in strong-field gravity
(University of Waterloo, 2023-07-19)In this thesis, we investigate bosonic fields in the strong-field and highly dynamical regime of general relativity focusing specifically on the black hole superradiance process of scalar and vector fields, as well as on ... -
Optimization of an All Normal Dispersion Fiber Laser and a Gain Managed Nonlinear Amplifier
(University of Waterloo, 2023-07-17)Ultrafast laser systems are used in a wide variety of modern laser research. The combination of an all-normal dispersion fiber laser and a gain-managed nonlinear fiber amplifier makes for inexpensive and easy to build ... -
Topological Manipulations of Quantum Field Theories
(University of Waterloo, 2023-07-17)In this thesis we study some topological aspects of Quantum Field Theories (QFTs). In particular, we study the way in which an arbitrary QFT can be separated into “local” and “global” data by means of a “symmetry Topological ... -
Correlation harvesting in the presence of Unruh and Hawking effects
(University of Waterloo, 2023-07-14)Quantum field theory (QFT) in curved spacetime is a study of quantum fields under the influence of the relativistic motion of particles or spacetime curvature. The famous outcomes of this subject are the Unruh and Hawking ... -
The black hole information paradox in a brane world
(University of Waterloo, 2023-06-28)Recent progress in our understanding of the black hole information paradox has led to a new prescription for calculating entanglement entropy, which involves special subsystems in regions where gravity is dynamical, called ... -
Cosmology with Cluster Structural Properties
(University of Waterloo, 2023-06-23)Galaxy clusters are massive objects composed of hundreds or thousands of galaxies, hot gas and an extended dark matter (DM) halo. They are the largest gravitationally bound structures in the Universe. As such, they result ... -
Exploring many-body Physics with Recurrent Neural Networks
(University of Waterloo, 2023-06-22)Originally developed within the natural language processing community, Recurrent neural networks (RNNs) have enabled remarkable progress in speech recognition and machine translation. These architectures belong to the class ... -
Symmetry and Topology in Disordered Systems
(University of Waterloo, 2023-06-14)Global symmetries greatly enrich the landscape of topological quantum phases, playing an essential role from symmetry-protection of topological insulators to symmetry charge fractionalization on anyons in fractional quantum ... -
(Non)-Invertible Topology in Quantum Field Theory
(University of Waterloo, 2023-06-05)This thesis aims to highlight aspects of mathematics and physics that arise in topological field theories. We will consider invertible and noninvertible topological theories. In the former case, we compute the classification ... -
Weak Coherent Pulse Source and Polarization Control for Quantum Key Distribution
(University of Waterloo, 2023-05-30)The Quantum EncrYption and Science Satellite will demonstrate quantum communication from space. One demonstration will be a satellite uplink using a weak coherent pulse source. This thesis will discuss work in minimizing ... -
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 ... -
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 ...