Browsing Science (Faculty of) by Subject "Quantum Information"
Now showing items 1-15 of 15
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Application of the Flag-State Squashing Model to Numerical Quantum Key Distribution Security Analysis
(University of Waterloo, 2020-09-18)The squashing model proof technique is a powerful tool in proving security of quantum key distribution (QKD) protocols since it reduces the dimension of the associated computational problem from infinite to finite. In the ... -
Coherent interactions and thermometry in a trapped ion quantum simulator
(University of Waterloo, 2022-10-27)Quantum simulators are useful tools to study exotic systems which may be otherwise intractable for a traditional computer. In particular, the trapped-ion platform has been a leading candidate for use in quantum simulation ... -
The computational power of many-body systems
(University of Waterloo, 2016-09-28)Many-body systems are well known throughout physics to be hard problems to exactly solve, but much of this is folklore resulting from the lack of an analytic solution to these systems. This thesis attempts to classify the ... -
Conical Designs and Categorical Jordan Algebraic Post-Quantum Theories
(University of Waterloo, 2017-01-06)Physical theories can be characterized in terms of their state spaces and their evolutive equations. The kinematical structure and the dynamical structure of finite dimensional quantum theory are, in light of the ... -
Entanglement Harvesting and Divergences in Unruh-DeWitt Detector Pairs
(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 and theoretical investigations of radio-frequency and optical trapping potentials for atomic ions
(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 ... -
Machine Learning and Optimization Techniques for Trapped-ion Quantum Simulators
(University of Waterloo, 2021-08-31)In recent years, quantum simulators have been the focus of intense research due to their potential in unraveling the inner workings of complex quantum systems. The exponential scaling of the Hilbert space of quantum systems ... -
Nanoscale quantum transport for quantum information processing
(University of Waterloo, 2013-04-25)In this thesis, I study quantum transport of electron (e.g., current and noise) in quantum dots exploring microscopic processes responsible for spin-relaxation in double quantum dots in Pauli spin blockade regime. This is ... -
Non-Markovianity in Logical Fidelity Estimation
(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 ... -
Sensing the shape of spacetime: detector response and entanglement harvesting in curved space
(University of Waterloo, 2019-01-24)This thesis seeks to understand what information Unruh-DeWitt detectors can gain about the structure of spacetime. By coupling to the quantum state of a field on a curved space, the detectors can gain information about ... -
Symmetry, Asymmetry and Quantum Information
(University of Waterloo, 2012-09-28)It is impossible to overstate the importance of symmetry in physics and mathematics. Symmetry arguments play a central role in a broad range of problems from simplifying a system of linear equations to a deep role in ... -
Theory and Applications of Josephson Photomultipliers
(University of Waterloo, 2012-08-31)This thesis describes the back action of microwave-photon detection via a Josephson photomultiplier (JPM), a superconducting qubit coupled strongly to a high-quality mi- crowave cavity, and the applications of these devices. ... -
Topics on the information theoretic limits of quantum information processing and its implementation
(University of Waterloo, 2015-02-24)Recent advances in quantum technologies enabled us to make large quantum states and pushed towards examining quantum theory at the macroscopic level. However observation of quantum e ects at a macroscopic level still ... -
Towards Photonic Chip Integration of an Oscillating Photonic Bell State from a Semiconductor Quantum Dot
(University of Waterloo, 2024-01-18)The demand for entangled photon sources has been growing in all areas of quantum information technologies. However, many modern single-photon sources suffer from fundamental limitations which limit their ability to produce ... -
Towards Real-World Adoption of Quantum Key Distribution using Entangled Photons
(University of Waterloo, 2012-08-21)In order for quantum key distribution (QKD) to move from the lab to widespread adoption, it will need to be compatible with existing infrastructure. To that end, I demonstrate an implementation of QKD with entangled ...