Browsing Theses by Title
Now showing items 11785-11804 of 15594
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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 ... -
Quantum fields and machine learning
(University of Waterloo, 2020-09-25)In this thesis, we use detector models to study various properties of quantum fields. One such property is the correlations present in fields. It is known that two uncorrelated detectors, upon coupling to a quantum field, ... -
Quantum Gates and Decoupling in Qubits with Fixed Transverse Coupling
(University of Waterloo, 2017-05-25)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, 2020-07-27)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 spin-1/2 XXZ model on a fully-frustrated honeycomb lattice
(University of Waterloo, 2010-10-01)In this thesis we present results from quantum Monte Carlo for the fully-frustrated honeycomb lattice. The XXZ model is of interest in the classical limit, as there is a mapping between the classical fully-frustrated ... -
Quantum Hacking in the Age of Measurement-Device-Independent Quantum Cryptography
(University of Waterloo, 2018-04-13)Cryptography is essential for secure communication in the digital era. Today, public-key cryptography is widely employed, and has provided an efficient method for encrypting content and ensuring both confidentiality and ... -
Quantum Indefinite Spacetime: Part II
(University of Waterloo, 2018-09-10)We adopt an operational mode of thinking to study spacetime fluctuations and their impacts on questions of quantum gravity. Particular emphasis is put on studying causal structure fluctuations. The study is guided by the ... -
Quantum independence and chromatic numbers
(University of Waterloo, 2019-08-28)In this thesis we are studying the cases when quantum independence and quantum chromatic numbers coincide with or differ from their classical counterparts. Knowing about the relation of chromatic numbers separation to the ... -
Quantum Information across Spacetime: From Gravitational Waves to Spinning Black Holes
(University of Waterloo, 2021-08-20)This thesis is split into two parts. In the first part, we investigate Bose-Einstein condensates (BECs) as a means to detect gravitational waves. For the detection of continuous gravitational waves, we study its sensitivity ... -
Quantum Information and Variants of Interactive Proof Systems
(University of Waterloo, 2011-08-24)For nearly three decades, the model of interactive proof systems and its variants have been central to many important and exciting developments in computational complexity theory such as exact characterization of some well ... -
Quantum Information Enabled Neutron Interferometry
(University of Waterloo, 2017-06-12)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 information in security protocols
(University of Waterloo, 2022-01-18)Information security deals with the protection of our digital infrastructure. Achieving meaningful real-world security requires powerful cryptographic models that can give strong security guarantees and it requires ... -
Quantum Information Processing with Adversarial Devices
(University of Waterloo, 2010-06-09)We consider several applications in black-box quantum computation in which untrusted physical quantum devices are connected together to produce an experiment. By examining the outcome statistics of such an experiment, and ... -
Quantum Key Distribution Data Post-Processing with Limited Resources: Towards Satellite-Based Quantum Communication
(University of Waterloo, 2013-01-23)Quantum key distribution (QKD), a novel cryptographic technique for secure distribution of secret keys between two parties, is the first successful quantum technology to emerge from quantum information science. The security ... -
Quantum key distribution devices: How to make them and how to break them
(University of Waterloo, 2016-08-30)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 Machine Learning for Recognizing Gaussian Discord
(University of Waterloo, 2022-01-25)The quantum correlations measured by quantum discord have been paying significant attention since they are an essential resource for quantum information. This thesis focuses on the quantum discord in continuous-variable ...