Browsing Physics and Astronomy by Title
Now showing items 519538 of 777

Quantum Algorithmic Techniques for FaultTolerant Quantum Computers
(University of Waterloo, 20191001)Quantum computers have the potential to push the limits of computation in areas such as quantum chemistry, cryptography, optimization, and machine learning. Even though many quantum algorithms show asymptotic improvement ... 
Quantum Algorithms for Interpolation and Sampling
(University of Waterloo, 20230815)Gibbs sampling from continuous realvalued 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 ... 
The quantum and the gravity: Newtonian and Cosmological applications
(University of Waterloo, 20180718)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, 20210928)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 InBetween
(University of Waterloo, 20230523)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, 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 ... 
Quantum Blind Data Compression and Structure of Quantum Operations Approximately Preserving Quantum States
(University of Waterloo, 20210729)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 Computational Particle Physics: Algorithms, Resource Estimation, and ModelBuilding
(University of Waterloo, 20220324)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 correlations in a noisy neutron interferometer
(American Physical Society, 20140915)We investigate quantum coherences in the presence of noise by entangling the spin and path degrees of freedom of the output neutron beam from a noisy threeblade perfect crystal neutron interferometer. We find that in the ... 
Quantum critical responses via holographic models and conformal perturbation theory
(University of Waterloo, 20170615)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 dopantfree GaAs/AlGaAs heterostructures
(University of Waterloo, 20210129)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 Gates and Decoupling in Qubits with Fixed Transverse Coupling
(University of Waterloo, 20170525)Among all the quantum computer candidates, the superconducting system is one of the most convincing platforms due to its strong couplings and scalability. To be more specific, this thesis focuses on the superconducting ... 
Quantum Gravity Renormalization Group
(University of Waterloo, 20200727)Investigations relating the emergence of the radial direction in the holography, solvable irrelevant deformations of conformal eld theories and holographic entanglement entropy are reported. Emphasis is laid on how ... 
Quantum groundstates of the spin1/2 XXZ model on a fullyfrustrated honeycomb lattice
(University of Waterloo, 20101001)In this thesis we present results from quantum Monte Carlo for the fullyfrustrated honeycomb lattice. The XXZ model is of interest in the classical limit, as there is a mapping between the classical fullyfrustrated ... 
Quantum Information across Spacetime: From Gravitational Waves to Spinning Black Holes
(University of Waterloo, 20210820)This thesis is split into two parts. In the first part, we investigate BoseEinstein condensates (BECs) as a means to detect gravitational waves. For the detection of continuous gravitational waves, we study its sensitivity ... 
Quantum Information Enabled Neutron Interferometry
(University of Waterloo, 20170612)Neutron interferometry with its ability to encode and extract information provides a test bed for quantum mechanics and precise measurement of physical quantities of significant importance in physics. However, this ... 
Quantum key distribution devices: How to make them and how to break them
(University of Waterloo, 20160830)As more aspects of modern society depend on digital communication, we increasingly rely on infrastructure that ensures the privacy and security of this communication. Classically, this has been provided by cryptographic ... 
Quantum Microwave Photodetection Using Superconducting Josephson Circuits.
(University of Waterloo, 20090903)Superconducting circuits have recently become a major contender for the implementation of quantum computers owing to their compatibility with existing microchip fabrication technologies. Their utility stems largely from ... 
Quantum pregeometry models for Quantum Gravity
(University of Waterloo, 20120823)In this thesis we review the status of an approach to Quantum Gravity through lattice toy models, Quantum Graphity. In particular, we describe the two toy models introduced in the literature and describe with a certain ... 
Quantum Probings of Curved Spacetimes
(University of Waterloo, 20210810)This thesis is divided into two parts. The first part studies the response of Unruh DeWitt detectors in different spacetimes. One of the main goals here is to demonstrate that Unruh DeWitt detectors can detect spacetime ...