• Laser-cooled Atomic Ensembles in Hollow Optical Fibers 

  Venuturumilli, Sai Sreesh (University of Waterloo, 2021-05-06)

  This thesis explores hollow-core fibres as a platform for quantum optics experiments with laser-cooled atomic ensembles. The non-diffracting, tightly-confined guided modes of these fibers grant us a ~µm-wide one-dimensional ...

• Non-Markovianity in Logical Fidelity Estimation 

  Caesura, Athena (University of Waterloo, 2021-02-26)

  As quantum devices are progressively scaled and refined, quantum codes will become indispensable to guarantee reliable computation in the presence of noise. Due to the difficulties of characterizing physical noise, direct ...

• Nuclear Spin Dynamics Under Above-Bandgap Optical Pumping in Silicon 

  Deshpande, Rahul (University of Waterloo, 2021-02-26)

  Phosphorus defects in silicon have been proposed as candidates for quantum information and quantum sensing applications, with proposals utilizing both the donor electron spin as well as the 31P nuclear spin. Initialization ...

• Classical simulations of quantum systems using stabilizer decompositions 

  Qassim, Hammam (University of Waterloo, 2021-02-19)

  One of the state of the art techniques for classically simulating quantum circuits relies on approximating the output state of the circuit by a superposition of stabilizer states. If the number of non-Clifford gates in ...

• Simulation and mitigation of noise in Rydberg atom systems using quantum optimal control 

  MBAKOB TCHOUAWOU, Caroline Laure (University of Waterloo, 2021-02-18)

  We design a quantum optimal control protocol to mitigate the noise in Rydberg atom systems.

• Mean-Field Theory of Collective Behavior of Quantum Dipolar Rotors 

  Liu, Bo (University of Waterloo, 2021-02-08)

  Motivated by the recent experimental measurements of the dielectric property of confined quantum dipolar molecules, the orientational dipolar ordering transition is investigated in the quantum generalization of the quantum ...

• What can detectors detect? 

  Henderson, Laura (University of Waterloo, 2021-01-29)

  This thesis is focused on using a pair of Unruh-DeWitt detectors, which interact locally with a quantum field, to gain information about properties of the field and the underlying spacetime. First, we consider a massless ...

• Quantum dot devices in silicon and dopant-free GaAs/AlGaAs heterostructures 

  Buonacorsi, Brandon (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 ...

• Mueller Matrix Confocal Scanning Laser Polarimetry and Optimal Conditions for Improved Image Quality 

  Zangoulos, Julia (University of Waterloo, 2021-01-26)

  Alzheimer's disease (AD), a fatal neurodegenerative disorder, is the most common form of senile dementia. Five hundred thousand Canadians are living with dementia, a number predicted to double by 2030. Currently, the most ...

• Frontiers of Gravity: Astrophysical Environments, Ringdown Nonlinearities and the Semiclassical Approximation 

  Sberna, Laura (University of Waterloo, 2021-01-22)

  Einstein’s general relativity is based on a tensorial, nonlinear equation for the spacetime metric. The gravitational interaction is however so weak that, in most circumstances, the equations can be solved perturbatively. ...

• Variational Quantum Eigensolvers Applied to Problems in High Energy Physics 

  Ferguson, Ryan (University of Waterloo, 2021-01-13)

  Variational methods have long been used to study strongly-correlated quantum systems. Despite the successes of classical protocols, these are limited in the study of quantum systems, either due to numerical errors like the ...

• Optics, Loss and Gravity 

  Adjei, Eugene (University of Waterloo, 2021-01-13)

  We look at some ideas that can be found from making connections among optics, non-Hermitian dynamics and gravity. Using nonlinear optics, we demonstrate how loss can be used to make brighter sources of thermal light. Also, ...

• Canonical Structure and Conservation Laws of General Relativity on Null Surfaces and at Null Infinity 

  Hopfmueller, Florian (University of Waterloo, 2021-01-12)

  The first part of this thesis addresses the canonical structure of general relativity on generic null surfaces. The pre-symplectic potential of metric general relativity, evaluated on a null surface, is decomposed into ...

• Proposed Methods For Measuring and Interpreting Mueller Matrices in In Vivo Retinal Polarimetry 

  Esau, Steven Kenneth (University of Waterloo, 2020-12-23)

  Mueller matrix polarimetry is the examination of how a sample transforms the polarization state of light. This requires probing the sample with input light of a variety of generated polarization states and analyzing the ...

• Risk associated with H2S evolution in sour aquifers during CO2 injection 

  Ghaderi, Seyyed M.; Keith, David W.; Lavoie, Rob; Leonenko, Yuri (Elsevier, 2011)

  Many aquifers suitable for CO2 sequestration contain measurable concentration of dissolved non-hydrocarbon species. In this paper, the compositional modelling of the CO2 injection into aquifers that contain dissolved ...

• Feasibility of Injecting Large Volumes of CO2 into Aquifers 

  Ghaderi, Seyyed M.; Keith, David W.; Leonenko, Yuri (Elsevier, 2009-02)

  Although it is recognized that deep aquifers offer a very large potential storage capacity for CO2 sequestration it is not clear how to fill the storage with a large volume of CO2 in a relatively short period of time. The ...

• Towards simulating 2D effects in lattice gauge theories on a quantum computer 

  Paulson, Daniel (University of Waterloo, 2020-10-26)

  Quantum Field Theories (QFTs) are the most successful theories for describing nature at its most fundamental level. Despite the fact that QFTs are capable of predicting a wide range of phenomena, obtaining solutions to ...

• Experimental and theoretical investigations of radio-frequency and optical trapping potentials for atomic ions 

  Sajjan, Manas (University of Waterloo, 2020-10-08)

  Over the years, trapped ion have emerged as one of the premier candidates for universal quantum simulation due to its long coherence time, low initialization and detection errors, robust high-fidelity gate sets and fully ...

• The S-Matrix of Gauge and Gravity Theories and The Two-Black Hole Problem 

  Guevara, Alfredo (University of Waterloo, 2020-10-01)

  This thesis is devoted to diverse aspects of scattering amplitudes in gauge theory and gravity including interactions with matter particles. In Part I we focus on the applications of massive scattering amplitudes in gravity ...

• Quantum Black Holes in the Sky 

  Wang, Qingwen (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 ...

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