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Some of the material in is restricted to members of the community. By logging in, you may be able to gain additional access to certain collections or items. If you have questions about access or logging in, please use the form on the Contact Page.
The weak nuclear form factor is the final missing piece to complete our understanding of the nuclear structure and the Coherent Elastic Neutrino Nucleus Scattering (CEvNS) cross section. The weak form factor is dominated by the neutron...
In this dissertation we study the behavior of several computational models of a magnetic nanopillar. We first compare the effect that coarse-graining the computational lattice has on the magnetization switching for three degrees of...
This dissertation presents a series of electron paramagnetic resonance investigations on molecule-based magnetic materials. We begin with an introduction to the field of Single-Molecules magnets in the Ch. 1 introduction. In Ch. 2 we...
We study a model for classification based upon Bayesian statistics. The model, called Bayesian Neural Networks (BNN), is based on a function that is a weighted sum of hyperbolic tangent functions. To illustrate this method, we apply it...
A promising proposal for quantum computation, due to Loss and DiVincenzo, is based on using electron spins in quantum dots as qubits - two-level systems which are the quantum analogues of classical bits. Two-qubit operations (quantum...
This dissertation describes our research into the properties of the interstellar medium (ISM) through the lens of numerical magnetohydrodynamical (MHD) simulations. Our research explores the prob- ability distribution functions (PDF) of...
The Standard Model (SM) describes almost all the particle physics experiments with a high accuracy. However, the SM has a lot of conceptual problems (spontaneous symmetry breaking is introduced by hand, the Higgs boson mass has to be...
Strongly correlated insulators (SCIs) are proposed as a promising material for photovoltaics because the strongly correlated \textit{d} electrons can facilitate the creation of multiple electron-hole pairs per incoming photon through a...
Doubly-connected superconducting loops are a class of superconducting devices of longstandinginterest in fundamental physics and practical applications. They have been studied since early 1960s and have received intensive recent interest...
ABSTRACT We calculate the associated production of a pseudoscalar (A) with a pair of heavy quarks at hadonic colliders, namely p pbar, pp →QQA + X for Q = b, t and X the remaining partonic interactions, including one-loop QCD corrections...
This dissertation mainly focuses on the investigation of the magnetic phase diagram of quasi two di- mensional triangular lattice antiferromagnets (TLAFs) Ba₃MNb₂O9 (M = Co2+ (S = 1/2), Mn2+ (S = 5/2)), and their multiferroic properties....
This dissertation is focused on electrical spin injection and detection at the nanoscale dimensions that semiconductor nanowires offer. Semiconductor spintronics is the natural extension of metallic spintronics for applications in...
SUSY is one of the most promising new physics ideas, and will soon be tested at high energy accelerators like the CERN LHC. Moreover SUSY provides a good candidate for cold dark matter (CDM). In this dissertation, we investigated...
Strongly correlated materials manifest some of the most intriguing behaviors found in condensed matter physics. However, their understanding remains a challenge because they cannot be described using standard theoretical approaches, as...
In the first two chapters of this dissertation, the total cross sections for 38 different reaction products produced in the interaction of 48Ca, 40S and 42S beams at energies around 100 MeV/nucleon with a liquid deuterium target are...
The ¹⁷F(p, γ)¹⁸Ne reaction plays an important role in various astrophysical processes. However, direct measurements of (p, γ) reactions involving radioactive nuclei will remain difficult even at cutting-edge facilities in the near future....
This dissertation describes a measurement of the muon charge asymmetry from W&rarr&mu&nu decay using 7.3 fb-1 of data collected from April 2002 to July 2010 using the D0 detector at Fermi National Accelerator Laboratory. The measurement...
Proteins, polymer chains comprised of amino acids, are one of the fundamental machines that drive life. They perform a wide variety of functions within the cell such as nutrient transport, cell signaling, energy production, DNA repair, ...
Transition metal dichalcogenides (TMDs or TMDCs) have garnered much interest recently due to their weakly layered structures, allowing for mechanical exfoliation down to a single atomic layer. As such, it is pertinent to re-examine the...
In this dissertation, the use of on-chip superconducting (SC) resonators as a probe of spin-photon interactions as well as other superconducting phenomena will be presented. In particular, coherent Rabi oscillations are demonstrated for...
We report a study on the magnetotransport properties and on the Fermi surfaces (FS) of the ZrSi(Se, Te) semimetals. Density Functional Theory (DFT) calculations, in absence of spin orbit coupling (SOC), reveal that both the Se and the Te...
Materials that contain f-electron elements often exhibit complex phase diagrams with different phenomena including nematic electronic states, charge and spin instabilities, the breakdown of Fermi liquid behavior, and unconventional...
The dynamic self-organization of lipids in biological systems is a highly regulated process that enables the compartmentalization of living systems at microscopic and nanoscopic levels. Exploiting the self-organization and innate...
The structure and dynamics of the (001) surface of potassium tantalate (KTaO3), doped with lithium (KTL) and niobium (KTN) have been investigated using high resolution helium atom diffraction and single-phonon creation and annihilation, ...
Interactions between charged residues are known to have significant effects on protein folding stability and binding properties. The contributions of different types of non-covalent interactions are altered by mutating one or more...
Measurements of γp → pη Differential Cross Sections and γp → pω Differential Cross Sections and Spin Density Matrix Elements ρ0, ρ3 Using CLAS at Jefferson Lab: A Study of the Production Mechanisms
Meson photoproduction off the nucleon has long been serving as a tool for understanding the properties of hadrons. At lower energy scales, the production mechanisms are dominated by the $s$-channel inelastic scattering process, where the...
Understanding the theory of how massive stars die is an important astrophysical challenge. An important result in core-collapse supernova (CCSN) theory is that spherically-symmetric, one-dimensional simulations routinely fail to explode, ...
The interest in cryo-electron microscopy has been reinvigorated by the recent introduction of direct electron detectors and the development of new software. Images of frozen proteins can now be collected with significantly higher signal...
Compute grids for applications have the potential to solve significant issues which contribute to low data processing and publication rates. This potential includes an ability to transparently manage large amounts of data and to greatly...
Geometrically frustrated systems have garnered much interest in recent times due to the emergence of novel magnetic states in these systems that contrast traditional cooperative magnetic phenomena. The spin ice pyrochlores Ho2Ti2O7 and...
Two heavy Fermion superconducting compounds, URu₂Si₂ and PuRhIn₅, were investigated by the techniques of chemical substitution and application of high magnetic fields. These materials are particularity interesting for their unique...
Measurement of Polarization Observables in Vector Meson Photoproduction Using a Transversely-Polarized Frozen-Spin Target and Polarized Photons at CLAS, Jefferson Lab
The study of baryon resonances provides a deeper understanding of the strong interaction because the dynamics and relevant degrees of freedom hidden within them are reflected by the properties of the excited states of baryons. Higher...
Type Ia supernovae (SNe Ia) mark the beginning and the end of stellar evolution. They are one of the most powerful cosmological probes in our universe thanks to their high intrinsic luminosities and standardizable properties. In the...
Two big questions in physics beyond the Standard Model of particles are nature of Dark Matter and a theory of Quantum Gravity. In this work, topics related to both of these improtant questions are presented. First, we introduce an...
New to physics, the experiments of this dissertation successfully acquired clear and extensive direct measurements in He II at 1.7 K of quantum turbulence induced by second sound shock pulses in a wide channel. Such pulses are moving...
If one could be built, a quantum computer would be capable of storing and manipulating quantum states with sufficient accuracy to carry out computations that no classical computer can do (most notably factoring integers in polynomial...
The Search for N* Resonances: Measurement of Differential Cross Sections and Polarization Observables for γp → pω and γp → K0Σ+ Using Circularly-Polarized Photons at CLAS, Jefferson Lab
The study of baryon resonances offers a deeper understanding of the strong interaction, since the dynamics and relevant degrees of freedom hidden within them are reflected by the properties of these states. The baryon resonances have...
We utilize crystal symmetry to develop low-energy models for a broad range of superlattice devices composed of stacks of FeSe (and similar iron-based superconductors), with the aim of engineering experimentally tunable couplings through...
This dissertation presents work on improving the sensitivity of Hall magnetometry for single magnetic nanoparticle measurement by miniaturizing the devices down to submicron range. Limiting factors for Hall device performance, including...
We investigate various fundamental aspects of the metal insulator transition (MIT) by employing several theoretical approaches. Describing the novel features of interacting electronic systems remains one of the principle challenges to...
The 14C(14C, d) reaction at 22 MeV was used to study Tz=2 26Na. Charged particles were detected with a Si detector telescope at 0º, and γ transitions in coincidence were detected with an array of three Compton-suppressed "clover"...
We performed forecasts of the uncertainty with which future surveys will measure the cosmological parameters of the non-flat ΛCDM model, extended to include the sum of neutrino masses Σν, and the effective number of relativistic species...
An interpretation of CMS searches for evidence of supersymmetry in the context of the minimal supersymmetric Standard Model (MSSM) is given. It is found that supersymmetric particles with color charge are excluded in the mass range below...
The formation of sub-structures within an atomic nucleus, appropriately termed nuclear clustering, is one of the core questions of nuclear many-body physics. In this thesis, we put forward a new method for the study of nuclear clustering...
In this thesis, we study the entanglement properties of quantum systems to characterize quantum phases and phase transitions. We focus on the free fermion lattice systems and we use numerical calculation to verify our ideas. Behavior of...
The dissertation presents the recent development of the third-generation femtosecond electron diffractometer in Professor Jim Cao's group. Two techniques, femtosecond electron shadow imaging and deflectometry (FESID) and femtosecond...
The persistent miniaturization of solid state devices has led us in the direction of integrating soft materials into solid-state structures. Since organic molecules have natural dimensions in the nanometer range or smaller, they can be...
This dissertation presents a search for large extra dimensions in the single photon plus missing transverse energy final states. We use a data sample of approximately 2.7fb⁻¹ of pp̄ collisions at√s= 1.96 TeV (recorded with the DØ...
We perform a survey of the ( proton K+ K− ), 3 charged track data taken by the CLAS detector for the HyCLAS experiment [1] during the g12 run-period at Jefferson Lab. We aim to study the strong decay amplitudes, partial widths and...
The set of valence-bond states --- states in which localized spin-1/2 particles are correlated in singlet pairs said to be connected by valence bonds --- provides a useful basis for visualizing singlet ground states of quantum spin...
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