Browsing Physics and Astronomy by Title
Now showing items 329-348 of 766
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Large-Scale Filaments From Weak Lensing
(University of Waterloo, 2015-10-01)In the context of non-linear structure formation, a web of dark filaments are expected to intersect the high density regions of the universe, where groups and clusters of galaxies will be forming. In this work we have ... -
Laser-Based Imaging of Novel Charge Density Wave and Superconducting Materials
(University of Waterloo, 2021-06-02)The following thesis presents experimental study of two crystalline materials which show correlated electron phases. The first material 1T-TaS2 is a two-dimensional van-der-Waals material. This family of materials ... -
Laser-cooled Atomic Ensembles in Hollow Optical Fibers
(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 ... -
Laser-initiated Coulomb explosion imaging of small molecules
(University of Waterloo, 2008-09-02)Momentum vectors of fragment ions produced by the Coulomb explosion of CO2z+ (z = 3 - 6) and CS2z+ (z = 3 - 13) in an intense laser field (~50 fs, 1 x 1015 W/cm2) are determined by the triple coincidence imaging technique. ... -
Late-universe signals in the microwave sky: extragalactic dust, electrons, and other baryonic effects
(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 ... -
Line-Scan Spectral-Domain Optical Coherence Tomography for Cellular Resolution Structural and Vascular Imaging of Biological Tissues
(University of Waterloo, 2022-06-07)Optical coherence tomography (OCT) is an optical interferometric technique for non-invasive contactless imaging of the cellular-level structures of biological tissues. However, the application of OCT for in-vivo volumetric ... -
Liquid Crystal State NMR Quantum Computing - Characterization, Control and Certification
(University of Waterloo, 2013-08-30)Quantum computers offer the possibility of solving some problems more efficiently than their classical counterparts. The current forerunner in the experimental demonstration of quantum algorithms is Nuclear Magnetic Resonance ... -
Local Group Analogues
(University of Waterloo, 2012-09-27)The abundance of satellite galaxies is a critical small-scale test of the standard cosmological model. From comparing the predictions of structure formation in simulations with observations of Local Group dwarf galaxies ... -
Locality and Exceptional Points in Pseudo-Hermitian Physics
(University of Waterloo, 2023-05-26)Pseudo-Hermitian operators generalize the concept of Hermiticity. Included in this class of operators are the quasi-Hermitian operators, which define a generalization of quantum theory with real-valued measurement outcomes ... -
Loop Optimization of Tensor Network Renormalization: Algorithms and Applications
(University of Waterloo, 2019-05-22)Loop optimization for tensor network renormalization (loop-TNR) is a real-space renormalization group algorithm suitable for studying 1+1D critical systems. While the original proposal by Yang et al. focused on classical ... -
The Low Temperature Magnetic Relaxation of Dy₂Ti₂O₇
(University of Waterloo, 2012-09-26)The recent formulation of the monopole picture of spin ice[1, 2, 3], has lead to several studies of the signatures of monopole excitations[2, 4], as well as studies of the motion of magnetic monopoles[5, 6, 7]. In this ... -
Low-temperature characterization of dielectric loss at microwave frequencies in aluminum oxide
(University of Waterloo, 2015-04-09)Superconducting quantum devices have gained increasing interest over the past 15 years because of their role as promising candidates for implementing a large-scale quantum computer and as ultra-sensitive detectors. ... -
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 ... -
Machine Learning Topological Defects of Liquid Crystals in Two Dimensions
(University of Waterloo, 2019-08-26)Over the recent few years, condensed matter physics has keenly been testing out the compelling techniques from the toolbox of machine learning. Order parameters, phase transitions, and other thermodynamic quantities have ... -
Magnetic Excitations in Transport Measurements of Novel Quantum Materials
(University of Waterloo, 2023-04-27)Quantum materials offer rich possibilities for quasiparticles that can revolutionalize our technology. The discovery of novel delocalized magnetic excitations in transport measurements implies that such quasiparticles are ... -
Magnetic Ordering of Dipolar Spin Ice in Moderate [111] Field
(University of Waterloo, 2016-09-08)This thesis explores the low temperature physics of the macroscopically degenerate system of dipolar spin ice in moderate fields applied along the [111] cubic axis. While most applications of field generically lift the ... -
Magnetoconductance due to variable-range hopping in quasi-two-dimensional systems: Application to PrBa2Cu3O7-delta
(American Physical Society, 1998-01)In this paper, we have developed a theory of magnetoconductance (magnetoresistance) due to variable-range hopping for quasi-two-dimensional systems. We have included the effect of electric fields on the calculation of the ... -
Magnetotransport experiments in GaAs 2D holes and RF-QPC readout in a lateral quantum dot device
(University of Waterloo, 2024-02-16)This thesis presents a set of experiments conducted on GaAs/AlGaAs heterostructures fabricated into Hall bars and a lateral quantum dot device. The Hall bar experiments seek to further the understanding of the complexity ... -
Magnetotransport in Transition Metal Dichalcogenide Semimetals
(University of Waterloo, 2021-06-02)In this thesis, we study the large magnetoresistance in MoTe2, and non-linear anomalous Hall effect in MoTe2 and WTe2. Thin flakes cleaved from layered single crystals exhibit high mobility, and semimetals show nearly ... -
Materials physics of half-metallic magnetic oxide films by Pulsed Laser Deposition: Controlling the crystal structure and near-surface properties of Sr2FeMoO6 and CrO2 films
(University of Waterloo, 2009-01-23)The idea of half-metallic ferromagnets was first introduced by de Groot et al. in 1983 based on their calculations. The density of state at the Fermi level for half-metallic ferromagnet is completely polarized, meaning ...