Browsing FAS Theses and Dissertations by FAS Department "Physics"
Now showing items 120 of 201

4d Spectra from BPS Quiver Dualities
(20130926)We attack the question of BPS occupancy in a wide class of 4d N = 2 quantum field theories. We first review the SeibergWitten approach to finding the low energy Wilsonian effective action actions of such theories. In ... 
A Search for Sterile Neutrinos at the NOνA Far Detector
(20161208)NOνA is the current United States flagship longbaseline neutrino experiment designed to study the properties of neutrino oscillations. It consists of two functionally identical detectors each located 14.6 mrad off the ... 
A Thermochemical Cryogenic Buffer Gas Beam Source of ThO for Measuring the Electric Dipole Moment of the Electron
(20170504)The discovery of an electric dipole moment of the electron (eEDM) within a few orders of magnitude of the current best limit would reveal the existence of timereversal symmetry (T) violating physics beyond the Standard ... 
A Transdimensional Perspective on Dark Matter
(20180513)Robust uncertainty propagation and marginalization over nuisance parameters is the key to per form robust inference. This thesis introduces a transdimensional, hierarchical, thresholdfree, and Bayesian inference framework. ... 
Advances in Ab Initio Modeling of the ManyBody Effects of Dispersion Interactions in Functional Organic Materials
(20151204)Accurate treatment of the longrange electron correlation energy, including dispersion interactions, is essential for describing the structure, dynamics, and function of a wide variety of systems. Among the most accurate ... 
An Integrated Diamond Nanophotonics Platform for Quantum Optics
(20180511)Efficient interfaces between optical photons and quantum bits are fundamental building blocks for quantum networks and largescale quantum computers. We demonstrate an integrated platform for scalable quantum optics based ... 
Analytical Methods in Mesoscopic Systems
(20121016)The propsect of designing technologies around the quantum behavior of mesoscopic devices is enticing. This thesis present several tools to facilitate the process of calculating and analyzing the quantum properties of such ... 
Apparatus and Methods for a New Measurement of the Electron and Positron Magnetic Moments
(20180105)This thesis presents contributions to two precision measurement experiments: electron and positron $g/2$, and ATRAP antihydrogen spectroscopy. The magnetic moment of the electron in Bohr magnetons, $g/2$, is the most ... 
Applications of Many Body Dynamics of Solid State Systems to Quantum Metrology and Computation
(20130318)This thesis describes aspects of dynamics of solid state systems which are relevant to quantum metrology and computation. It may be divided into three research directions (parts). For the first part, a new method to enhance ... 
Aspects of Symmetry in Asymptotically Flat Spacetimes
(20180511)We explore the nature and implications of a variety of asymptotic symmetry groups associated to gauge theory and quantum gravity in asymptotically flat spacetimes. We reexpress Weinberg's soft graviton theorem as a Ward ... 
Aspects of Symmetry in de Sitter Space
(20140606)We study various aspects of symmetry in fourdimensional de Sitter space (dS$_4$). 
Asymptotic Symmetries in FourDimensional Gauge and Gravity Theories
(20170511)Recent developments have uncovered a deep relationship between soft theorems in quantum field theories and asymptotic symmetries. We investigate five explicit examples wherein these connections are studied and verified. ... 
Atomic BoseHubbard Systems With SingleParticle Control
(20151214)Experiments with ultracold atoms in optical lattices provide outstanding opportunities to realize exotic quantum states due to a high degree of tunability and control. In this thesis, I present experiments that extend this ... 
BAT Slew Survey (BATSS): Slew Data Analysis for the SwiftBAT Coded Aperture Imaging Telescope
(20130318)The BAT Slew Survey (BATSS) is the first widefield survey of the hard Xray sky (15–150 keV) with a slewing coded aperture imaging telescope. Its fine time resolution, high sensitivity and large sky coverage make it ... 
Beam Characterization and Systematics of the Bicep2 and Keck Array Cosmic Microwave Background Polarization Experiments
(20141021)Inflation, which posits an exponential expansion in the early universe, is well motivated since it resolves questions that are left unexplained by standard LCDM cosmology, such as the flatness and homogeneity of the universe. ... 
Brane Constructions and BPS Spectra
(20131007)The object of this work is to exploit various constructions of string theory and Mtheory to yield new insights into supersymmetric theories in both four and three dimensions. In 4d, we extend work on SeibergWitten theory ... 
Carving Out the Space of Conformal Field Theories
(20121219)We study the constraints of conformal symmetry and unitarity in Conformal Field Theories (CFTs). Crossing symmetry of fourpoint functions implies universal bounds on operator dimensions and threepoint function coefficients. ... 
Channel Length Scaling in Microwave Graphene Field Effect Transistors
(20180512)In order to operate at microwave frequencies and higher, the channel length of a field effect transistor must be made very short ($\sim25$nm at 1THz) to minimize input capacitance and the drift time of carriers through the ... 
Chirality of Light and Its Interaction with Chiral Matter
(20130318)This thesis conducts a systematic study on the chirality of light and its interaction with chiral matter. In the theory section, we introduce a measure of local density of chirality, applying to arbitrary electromagnetic ... 
A Classical Perspective on NonDiffractive Disorder
(20160128)The unifying themes connecting the chapters in this dissertation are the profound and often surprising effects of disorder in classical and quantum systems and the tremendous insight gained from a classical perspective, ...