Now showing items 1-20 of 25

    • Applications of Entanglement and Nonlocality 

      Gangopadhyay, Sayan (University of Waterloo, 2021-09-20)
      Entanglement and nonlocality are two of the features demonstrated by quantum systems which give rise to new possibilities in a variety of fields such as communication technology, cryptography and the study of fundamental ...
    • Aspects of Quantum Field Theory with Boundary Conditions 

      Tjoa, Erickson (University of Waterloo, 2019-08-02)
      This thesis has two modest goals. The primary goal is to deliver three results involving particle detectors interacting with a quantum field in presence of non-trivial boundary conditions (Dirichlet, Neumann, periodic; ...
    • Aspects of Quantum Information and AdS/CFT Duality 

      Al Balushi, Abdulrahim (University of Waterloo, 2021-05-17)
      This thesis considers four different aspects of quantum information, AdS/CFT duality, and the interplay between them. First, we study the holographic complexity conjectures in detail for rotating black holes. We focus ...
    • Charged Black Hole Solutions in Alternative Theories of Gravity 

      Meiers, Michael (University of Waterloo, 2016-09-06)
      In my thesis, I examine charged black holes in two contexts. The first part covers the formation of something analogous to event horizons for a class of Lorentz-Violating theories which allow for signals to travel faster ...
    • Detectors, Reference Frames, and Time 

      Smith, Alexander R. H. (University of Waterloo, 2017-11-08)
      This thesis is divided into three parts. Part I investigates the behaviour of Unruh-DeWitt detectors on curved spacetimes admitting a Wightman function and the associated measurement model is identified. These detectors ...
    • Entanglement Harvesting and Divergences in Unruh-DeWitt Detector Pairs 

      Sachs, Allison (University of Waterloo, 2017-08-28)
      We analyze correlations between pairs of detectors quadratically coupled to real and complex scalar bosonic fields in 3+1 dimensions. This is a first step toward studying the entanglement structure of the fermionic ...
    • Experimental prospects for detecting the quantum nature of spacetime 

      Corona Ugalde, Paulina (University of Waterloo, 2017-09-21)
      This thesis is concerned with advancing the confrontation between relativistic quantum information (RQI) and experiment. We investigate the lessons that some present-day experiments can teach us about the relationship ...
    • Explorations in black hole chemistry and higher curvature gravity 

      Hennigar, Robie (University of Waterloo, 2018-08-08)
      This thesis has two goals. The primary goal is to communicate two results within the framework of black hole chemistry, while the secondary goal is concerned with higher curvature theories of gravity. Super-entropic ...
    • Explorations of Black Hole Thermodynamics in de Sitter Spacetime 

      Mbarek, Saoussen (University of Waterloo, 2019-01-23)
      In this thesis I map out two approaches that are foundational to studying black hole thermodynamics in de Sitter spacetime. The first is to understand the "thermodynamic volume" of cosmological horizons in isolation. ...
    • Exploring new routes to decoherence-free quantum computing; and quantum thermodynamics for fermions 

      Onuma-Kalu, Marvellous (University of Waterloo, 2020-01-23)
      This thesis has two parts; the first part is a contribution to the research field of quantum measurement in quantum optics while the second part focuses on quantum thermodynamics for fermionic systems. The aim of the ...
    • Gravitational Thermodynamics: From Black Holes to Holography 

      Simovic, Fil (University of Waterloo, 2021-06-01)
      The subject of gravitational thermodynamics lies at the center of numerous fields of study, many of which may seem disconnected, yet have proven to be deeply entwined. This thesis examines two primary facets of this subject, ...
    • Interpolated Collision Model Formalism 

      Grimmer, Daniel (University of Waterloo, 2020-09-16)
      The dynamics of open quantum systems (i.e., of quantum systems interacting with an uncontrolled environment) forms the basis of numerous active areas of research from quantum thermodynamics to quantum computing. One approach ...
    • Late-universe signals in the microwave sky: extragalactic dust, electrons, and other baryonic effects 

      McCarthy, Fiona (University of Waterloo, 2021-06-07)
      This thesis collects much of the work I have done over the last four years as a PhD student. It has two focuses. Part 1 discusses gravitational radiation emitted from two maximally charged black holes in Einstein--Maxwell--dilaton ...
    • On the Robustness of Holographic Dualities: AdS Black Holes and Quotient Spaces 

      Sinamuli Musema, Cedric (University of Waterloo, 2018-08-10)
      This dissertation is a collection of works on different topics based on holographic dualities. The dualities studied here are the Kerr/CFT and AdS/CFT correspondence and the researches carried on aim to check their robustness ...
    • Probing the Unruh and Hawking effects using Unruh-DeWitt detectors 

      Ahmadzadegan, Aida (University of Waterloo, 2017-10-18)
      Quantum field theory is so far the best description of the fundamental laws of Nature, yet it does not fully incorporates gravitation. The first attempt toward unifying the quantum field theory and gravity is a semi-classical ...
    • The quantum and the gravity: Newtonian and Cosmological applications 

      Altamirano, Natacha (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 

      Mohamed, Mayar (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 Information across Spacetime: From Gravitational Waves to Spinning Black Holes 

      Robbins, Matthew (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 Probings of Curved Spacetimes 

      Cong, Wan (University of Waterloo, 2021-08-10)
      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 ...
    • Quantum-Classical Correspondence and Entanglement in Periodically Driven Spin Systems 

      Kumari, Meenu (University of Waterloo, 2019-08-09)
      This dissertation sets out to examine some fundamental open questions in quantum physics regarding quantum-classical correspondence in regular versus chaotic systems. Specifically, we study these questions using approaches ...

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