Browsing Theses by Title
Now showing items 11689-11708 of 15492
-
Quantum Algorithms for Interpolation and Sampling
(University of Waterloo, 2023-08-15)Gibbs sampling from continuous real-valued functions is a challenging problem of interest in machine learning. Here we leverage quantum Fourier transforms to build a quantum algorithm for this task when the function is ... -
Quantum algorithms for searching, resampling, and hidden shift problems
(University of Waterloo, 2012-09-21)This thesis is on quantum algorithms. It has three main themes: (1) quantum walk based search algorithms, (2) quantum rejection sampling, and (3) the Boolean function hidden shift problem. The first two parts deal with ... -
The quantum and the gravity: Newtonian and Cosmological applications
(University of Waterloo, 2018-07-18)The gravitational decoherence field studies the suppression of coherence in quantum systems caused by effects rooted in the gravitational interaction. This models are not just important to yield interesting ideas about the ... -
Quantum Annealing: Research and Applications
(University of Waterloo, 2021-09-28)This thesis studies several aspects of the quantum annealing (QA) computing approach. Quantum annealers' primary objective is to solve hard computational optimization problems. Because these optimization problems are in ... -
Quantum Aspects of Black Holes: From Microstates to Echoes and Somewhere In-Between
(University of Waterloo, 2023-05-23)In this thesis we explore quantum aspects of black holes from a variety of perspectives. In part I of this thesis we are motivated by the black hole information paradox to explore the idea of gravitational wave echoes ... -
Quantum Black Holes in the Sky
(University of Waterloo, 2020-09-30)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 ... -
Quantum Blind Data Compression and Structure of Quantum Operations Approximately Preserving Quantum States
(University of Waterloo, 2021-07-29)In this thesis, we investigate a variation of quantum information processing tasks, blind data compression, and we analyze an approximation of a structure of a set of quantum states closely related to the task, which is ... -
Quantum Cellular Automata: Theory and Applications
(University of Waterloo, 2007-09-26)This thesis presents a model of Quantum Cellular Automata (QCA). The presented formalism is a natural quantization of the classical Cellular Automata (CA). It is based on a lattice of qudits, and an update rule consisting ... -
Quantum Coherence in Electrical Circuits
(University of Waterloo, 2010-08-03)This thesis studies quantum coherence in macroscopic and mesoscopic dissipative electrical circuits, including LC circuits, microwave resonators, and Josephson junctions. For the LC resonator and the terminated transmission ... -
Quantum Compression and Quantum Learning via Information Theory
(University of Waterloo, 2020-12-21)This thesis consists of two parts: quantum compression and quantum learning theory. A common theme between these problems is that we study them through the lens of information theory. We first study the task of visible ... -
Quantum Computation with Superconducting Parametric Cavity
(University of Waterloo, 2020-12-14)Multimode superconducting parametric cavity is a flexible platform that has been used to study a variety of topics in microwave quantum optics ranging from parametric amplification, entanglement generation to higher order ... -
Quantum Computational Particle Physics: Algorithms, Resource Estimation, and Model-Building
(University of Waterloo, 2022-03-24)Quantum simulation is one of the most promising applications of quantum computers. It is anticipated that quantum simulation will accelerate scientific discovery, and advance our understanding of nature. One area that ... -
Quantum Cost Models for Cryptanalysis of Isogenies
(University of Waterloo, 2019-05-01)Isogeny-based cryptography uses keys large enough to resist a far-future attack from Tani’s algorithm, a quantum random walk on Johnson graphs. The key size is based on an analysis in the query model. Queries do not ... -
Quantum critical responses via holographic models and conformal perturbation theory
(University of Waterloo, 2017-06-15)We investigate response functions near quantum critical points, allowing for finite temperature and a mild deformation by a relevant scalar. When the quantum critical point is described by a conformal field theory, we use ... -
Quantum dot devices in silicon and dopant-free GaAs/AlGaAs heterostructures
(University of Waterloo, 2021-01-29)Single spin quantum dot qubits in silicon are a promising candidate for a scalable quantum processor due to their long coherence times, compact size, and ease of integration into existing fabrication technologies. Realizing ... -
Quantum Dots for Intermediate Band in Solar Cells
(University of Waterloo, 2013-01-25)The commercially available solar cells suffer from low efficiency and high cost. This would avoid presence of solar cells as a secure energy resource in the market. Problems stem from two facts. Firstly, band gap of materials ... -
Quantum Dynamics and Statistical Mechanics of Endohedral Water
(University of Waterloo, 2016-09-07)Since first being synthesized in 2011,H2O@C60 has attracted much attention in the literature. Many interesting quantum phenomena are associated with this system, including ortho-para conversion, rotational ground state ... -
Quantum effects in molecular systems
(University of Waterloo, 2014-08-18)This thesis presents two different approaches and applications where nuclear dynamics are treated quantum mechanically in order to obtain more accurate theoretical predictions of molecular properties. In our first application, ... -
Quantum experiments with single-photon spin-orbit lattice arrays
(University of Waterloo, 2019-09-19)The thesis introduces two single-photon experiments with the lattice of spin-orbit arrays. The basic background knowledge has been introduced in Chapter 1. Chapters 2-4 describe the detailed techniques used in these two ... -
Quantum Field Theory: Motivating the Axiom of Microcausality
(University of Waterloo, 2012-09-19)Axiomatic quantum field theory is one approach to the project of merging the special theory of relativity with that of ordinary quantum mechanics. The project begins with the postulation of a set of axioms. Axioms should ...