Now showing items 21-40 of 263

• #### Aspects of Symmetry in the Infrared ﻿

(2019-05-09)
This dissertation studies a class of infinite-dimensional symmetries, known as asymptotic symmetries, across a variety of gauge and gravitational theories. In identifying the physical implications of these symmetries with ...
• #### Asymptotic Symmetries in Four-Dimensional Gauge and Gravity Theories ﻿

(2017-05-11)
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 Bose-Hubbard Systems With Single-Particle Control ﻿

(2015-12-14)
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 Swift-BAT Coded Aperture Imaging Telescope ﻿

(2013-03-18)
The BAT Slew Survey (BATSS) is the first wide-field survey of the hard X-ray 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 ﻿

(2014-10-21)
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. ...
• #### Biomolecules, Combinatorics, and Statistical Physics ﻿

(2019-05-13)
Motivated by the combinatorial properties of the protein-design problem and the specific and non-specific interactions in biomolecular systems, we build exactly-solved models for the statistical physics of the symmetric ...
• #### Biophysics of Mitotic Spindle Positioning in Caenorhabditis elegans Early Embryos ﻿

(2020-05-15)
In the C. elegans early embryo, the pronuclei complex migrates to the cell center and rotates such that the mitotic spindle forms along the anterior-posterior axis. Subsequently, the spindle undergoes transverse oscillations ...
• #### Bootstrapping High-Energy States in Conformal Field Theories ﻿

(2019-05-16)
We analyze the operator spectrum of Conformal Field Theories at large conformal dimensions $\Delta$ with and without global symmetries. General constraints of crossing symmetry and unitarity allow us to extract a number ...
• #### Brane Constructions and BPS Spectra ﻿

(2013-10-07)
The object of this work is to exploit various constructions of string theory and M-theory to yield new insights into supersymmetric theories in both four and three dimensions. In 4d, we extend work on Seiberg-Witten theory ...
• #### Building Quantum Networks Using Diamond Nanophotonics ﻿

(2020-05-11)
The construction of a quantum internet, an interconnected network which can distribute and store quantum states, is an essential step towards the development of next generation quantum technologies, including unconditionally ...
• #### Building Single Molecules - Reactions, Collisions, and Spectroscopy of Two Atoms ﻿

(2019-05-21)
Recent theoretical and experimental advances have led to better understanding and control of simple molecules, bringing them to the forefront of quantum science. Diatomic polar molecules, with their vibrational and rotational ...
• #### Carving Out the Space of Conformal Field Theories ﻿

(2012-12-19)
We study the constraints of conformal symmetry and unitarity in Conformal Field Theories (CFTs). Crossing symmetry of four-point functions implies universal bounds on operator dimensions and three-point function coefficients. ...
• #### Channel Length Scaling in Microwave Graphene Field Effect Transistors ﻿

(2018-05-12)
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 ﻿

(2013-03-18)
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 Non-Diffractive Disorder ﻿

(2016-01-28)
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, ...
• #### The Classical-Quantum Correspondence of Polyatomic Molecules ﻿

(2016-05-10)
In this thesis, we study the classical-quantum correspondence of polyatomic molecules to further understand their rotational and vibrational behavior. More specifically, we focus on two different scenarios: (1) completely ...
• #### Classification and Construction of Topological Phases of Quantum Matter ﻿

(2019-05-06)
We develop a theoretical framework for the classification and construction of symmetry protected topological (SPT) phases, which are a special class of zero-temperature phases of strongly interacting gapped quantum many-body ...
• #### Coherent control of diamond defects for quantum information science and quantum sensing ﻿

(2014-06-06)
Quantum mechanics, arguably one of the greatest achievements of modern physics, has not only fundamentally changed our understanding of nature but is also taking an ever increasing role in engineering. Today, the control ...
• #### Coherent Optical Control of Atom-Like Defects in Diamond: Probing Internal Dynamics and Environmental Interactions ﻿

(2017-09-07)
The nitrogen-vacancy (NV) center in diamond has emerged as a versatile atom-like system, finding diverse applications at both ambient and cryogenic temperatures. At room temperature, the NV center's spin-triplet electronic ...
• #### Coherent scattering in two dimensions: graphene and quantum corrals ﻿

(2014-02-25)
Two dimensional electronic materials provide a vibrant area for applying basic quantum mechanics and scattering theory. In quantum corrals, multiple scattering leads to resonances closely approximating eigenstates of an ...