Open Access. Powered by Scholars. Published by Universities.^{®}
 Discipline

 Condensed Matter Physics (52)
 Quantum Physics (49)
 Atomic, Molecular and Optical Physics (35)
 Optics (28)
 Elementary Particles and Fields and String Theory (21)

 Engineering (20)
 Other Physics (15)
 Statistical, Nonlinear, and Soft Matter Physics (12)
 Nuclear (12)
 Biological and Chemical Physics (12)
 Chemistry (11)
 Life Sciences (9)
 Engineering Physics (8)
 Mathematics (7)
 Social and Behavioral Sciences (7)
 Biochemistry, Biophysics, and Structural Biology (6)
 Electrical and Computer Engineering (6)
 Computer Sciences (6)
 Materials Science and Engineering (6)
 Environmental Sciences (5)
 Statistics and Probability (4)
 Biophysics (4)
 Arts and Humanities (4)
 Neuroscience and Neurobiology (4)
 Library and Information Science (4)
 Astrophysics and Astronomy (3)
 Applied Mathematics (3)
 Fluid Dynamics (3)
 Keyword

 Dbranes (10)
 AdSCFT Correspondence (7)
 NMR (7)
 NLO Computations (6)
 Supersymmetric gauge theory (6)

 QCD Phenomenology (5)
 Metamaterials (5)
 Plasmonics (4)
 QCD (4)
 Quantum computing (4)
 Brane Dynamics in Gauge Theories (4)
 Quantal density functional theory (4)
 Physics (4)
 Quantum information (4)
 Quantum computation (3)
 Nuclear Magnetic Resonance (3)
 Quantum dots (3)
 Spectroscopy (3)
 Polaritons (3)
 Random media (3)
 Batteries (3)
 Semiconductors (3)
 AharonovBohm effect (2)
 Correlationkinetic energy (2)
 Complex networks (2)
 Black Holes in String Theory (2)
 Black Holes (2)
 Diffusion (2)
 1/N Expansion (2)
 Ballistic transport (2)
 Publication Year
 Publication
 Publication Type
 File Type
Articles 1  30 of 324
FullText Articles in Physics
Particle Dynamics In AntiDe Sitter Space By Eih Method, Jiusi Lei
Particle Dynamics In AntiDe Sitter Space By Eih Method, Jiusi Lei
Dissertations, Theses, and Capstone Projects
Following the work of Einstein, Infeld and Hoffmann, we show that particle dynamics in Antide Sitter spacetime can be built up by regarding singularities in spacetime manifold as the source of particles.
Since gauge fields play a foundational role in the action, the singularities are chosen to be pointlike instantons. Their winding number, defined by an integration on the spheres surrounding those singularities, will turn out to be related to their masses. And their action, derived from the ChernSimons forms, will be a coadjoint orbit action, with group element g ∈ SO(4, 2) describing the collective coordinates of the particle ...
Wave Propagation In Random And Topological Media, Yuhao Kang
Wave Propagation In Random And Topological Media, Yuhao Kang
Dissertations, Theses, and Capstone Projects
This thesis discusses wave propagation in two kinds of systems, random media and topological insulators. In a disordered system, the wave is randomized by multiple scattering. The scattering matrix and associated delay times are powerful tools with which to describe wave transport. We discuss the relation among the Wigner time, the transmission time, and energy density in a lossless or lossy system. We propose the zeros of the transmission matrix and show how to manipulate the zerotransmission mode in a nonunitary system. In a photonic topological insulator, we realize an edge mode and discuss its robustness in the face of ...
An Accurate Solution Of The SelfSimilar OrbitAveraged FokkerPlanck Equation For CoreCollapsing Isotropic Globular Clusters: Properties And Application, Yuta Ito
Dissertations, Theses, and Capstone Projects
Hundreds of dense star clusters exist in almost all galaxies. Each cluster is composed of approximately ten thousand through ten million stars. The stars orbit in the clusters due to the clusters' selfgravity. Standard stellar dynamics expects that the clusters behave like collisionless selfgravitating systems on short time scales (~ million years) and the stars travel in smooth continuous orbits. Such clusters temporally settle to dynamically stable states or quasistationary states (QSS). Two fundamental QSS models are the isothermal and polytropic spheres since they have similar structures to the actual core (central part) and halo (outskirt) of the clusters. The two ...
Fabrication Of Magnetocaloric La(Fe,Si)13 Thick Films, N H. Dung, N B. Doan, P De Rango, L Ranno, Karl G. Sandeman, N M. Dempsey
Fabrication Of Magnetocaloric La(Fe,Si)13 Thick Films, N H. Dung, N B. Doan, P De Rango, L Ranno, Karl G. Sandeman, N M. Dempsey
Publications and Research
La(Fe,Si)_{13}–based compounds are considered to be very promising magnetocaloric materials for magnetic refrigeration applications. Many studies have focused on this material family but only in bulk form. In this paper we report on the fabrication of thick films of La(Fe,Si)_{13}, both with and without posthydriding. These films exhibit magnetic and structural properties comparable to bulk materials. We also observe that the ferromagnetic phase transition has a negative thermal hysteresis, a phenomenon not previously found in this material but which may have its origins in the availability of a strain energy reservoir, as in ...
Generalized FourDimensional Effective Hadronic Supersymmetry Based On Quantum Chromodynamics (Qcd), Enxi Yu
Generalized FourDimensional Effective Hadronic Supersymmetry Based On Quantum Chromodynamics (Qcd), Enxi Yu
Dissertations, Theses, and Capstone Projects
New discovery in multiple laboratories around the globe has shown a supersymmetry between hadrons—baryons and mesons. In order to generalize the phenomenological hadronic supersymmetry, the spinflavor SU(6) symmetry need an extension. This thesis present how we can extend SU(6) symmetry so that hadronic supersymmetry can be included. In the future, this extension can be also applied to pentaquark and tetraquark bags, for which there is an ongoing research in laboratories.
Proton Pumping Mechanism In Cytochrome C Oxidase, Xiuhong Cai
Proton Pumping Mechanism In Cytochrome C Oxidase, Xiuhong Cai
Dissertations, Theses, and Capstone Projects
Cytochrome c Oxidase (CcO), is the terminal electron acceptor in the membrane bound aerobic respiratory chain. It reduces O_{2} to water. The energy released by this reaction is stored by pumping protons from the high pH, Nside of the membrane to the low pH, Pside. The generated proton gradient provides the motive force for synthesis of ATP by the ATP synthase.
Building a proton gradient across the membrane requires that proton transport must occur along controllable proton pathways to prevent proton leakage to the Nside. It has been suggested that CcO function requires proton transfer channels in both the ...
At The Interface Of Algebra And Statistics, TaiDanae Bradley
At The Interface Of Algebra And Statistics, TaiDanae Bradley
Dissertations, Theses, and Capstone Projects
This thesis takes inspiration from quantum physics to investigate mathematical structure that lies at the interface of algebra and statistics. The starting point is a passage from classical probability theory to quantum probability theory. The quantum version of a probability distribution is a density operator, the quantum version of marginalizing is an operation called the partial trace, and the quantum version of a marginal probability distribution is a reduced density operator. Every joint probability distribution on a finite set can be modeled as a rank one density operator. By applying the partial trace, we obtain reduced density operators whose diagonals ...
Generating Entanglement With The Dynamical Lamb Effect, Mirko Amico
Generating Entanglement With The Dynamical Lamb Effect, Mirko Amico
Dissertations, Theses, and Capstone Projects
According to quantum field theory, the vacuum is filled with virtual particles which can be turned into real ones under the influence of external perturbations. Phenomena of this kind are commonly referred to as quantum vacuum phenomena. Several quantum vacuum phenomena related to the peculiar nature of the quantum vacuum have been predicted, some of which, such as the Lamb shift and the Casimir effect, have been experimentally found. Other examples of quantum vacuum phenomena include the Unruh effect, the dynamical Casimir effect and the dynamical Lamb effect. The dynamical Lamb effect was first predicted by considering the situation of ...
SmallX Qcd Calculations With A Biased Ensemble, Gary Kapilevich
SmallX Qcd Calculations With A Biased Ensemble, Gary Kapilevich
Dissertations, Theses, and Capstone Projects
In this dissertation, I will argue that we can study functional fluctuations in unintegrated gluon distributions, in the MV model as well as JIMWLK, using reweighting techniques, which will allow me to calculate QCD observables with "biased ensembles". This technique will enable me to study rare functional configurations of the gluon distributions, that might have been selected for in, for example, the centrality criteria used by the ATLAS and ALICE collaborations. After a review of these techniques, as well as a review of QCD physics at high energy in general, I will use biased ensembles to compute observables in two ...
Syllabus Ee330 Electromagnetics, Nicholas Madamopoulos
Syllabus Ee330 Electromagnetics, Nicholas Madamopoulos
Open Educational Resources
Concepts covered in the undergraduate electrical engineering class of electromagnetics
IiVi TypeIi Quantum Dot Superlattices For Novel Applications, Vasilios Deligiannakis
IiVi TypeIi Quantum Dot Superlattices For Novel Applications, Vasilios Deligiannakis
Dissertations, Theses, and Capstone Projects
In this thesis, we discuss the growth procedure and the characterization results obtained for epitaxially grown submonolayer typeII quantum dot superlattices made of IIVI semiconductors. We have investigated the spin dynamics of ZnSe layers with embedded typeII ZnTe quantum dots and the use of (Zn)CdTe/ZnCdSe QDs for intermediate band solar cell (IBSC). Samples with a higher quantum dot density exhibit longer electron spin lifetimes, up to ~1 ns at low temperatures. Tellurium isoelectronic centers, which form in the ZnSe spacer regions as a result of the growth conditions, were also probed. A new growth sequence for typeII (Zn ...
Density Functional Theory Study Of TwoDimensional Boron Nitride Films, Pradip R. Niraula
Density Functional Theory Study Of TwoDimensional Boron Nitride Films, Pradip R. Niraula
Dissertations, Theses, and Capstone Projects
Since graphene was isolated in 2004, the number of twodimensional (2D) materials and their scientific relevance have grown exponentially. Besides graphene, one of the most important and technolocially promizing 2D materials that has emerged in recent years is hexagonal boron nitride, in its monolayer or multilayer form. In my thesis work, I used density functional theory (DFT) calculations to investigate the properties of boron nitride films. In particular, I first studied the properties (i.e. formation energy, defect states, and structure) of point charged defects in monolayer and bilayer hexagonal boron nitride, and subsequently, I focused on the linear and ...
Effect Of DirectCurrent Magnetic Field On The Specific Absorption Rate Of Metamagnetic Comnsi: A Potential Approach To Switchable Hyperthermia Therapy, K C. Ugochukwu, M M. Sadiq, E S. Biegel, L Meagher, M R. Hill, Karl G. Sandeman, A Haydon, K Suzuki
Effect Of DirectCurrent Magnetic Field On The Specific Absorption Rate Of Metamagnetic Comnsi: A Potential Approach To Switchable Hyperthermia Therapy, K C. Ugochukwu, M M. Sadiq, E S. Biegel, L Meagher, M R. Hill, Karl G. Sandeman, A Haydon, K Suzuki
Publications and Research
Materials with 1st order antiferromagnetic (AFM) to highmagnetization (MM) phase transition known for their inverse magnetocaloric effect, abrupt rise in magnetization and magnetoelastic coupling, are promising for application in combined simultaneous diagnosis and targeted cancer therapy. A therapy that combines alternatingcurrent (ac) and directcurrent (dc) magnetic fields for simultaneous magnetic hyperthermia therapy (MHT) and magnetic resonance imaging (MRI), using same magnetic particles for heating and as con trast agents. We report a proofofconcept study on the induction heating ability of 1st order metamagnetic material with moderate specific absorption rates (SAR) and no tendency for agglomeration, for potential MHT and MRI ...
Optical Potts Machine Through Networks Of ThreePhoton DownConversion Oscillators, Mostafa HonariLatifpour, MohammadAli Miri
Optical Potts Machine Through Networks Of ThreePhoton DownConversion Oscillators, Mostafa HonariLatifpour, MohammadAli Miri
Publications and Research
In recent years there has been a growing interest in optical simulation of lattice spin models for applications in classical computing. Here, we propose optical implementation of a threestate Potts spin model by using networks of coupled parametric oscillators with phase tristability. We first show that the cubic nonlinear process of spontaneous threephoton downconversion is accompanied by a tristability in the phase of the subharmonic signal between three states with 2��/3 phase contrast. The phase of such a parametric oscillator behaves like a threestate spin system. Next, we show that a network of dissipatively coupled threephoton downconversion oscillators emulates ...
An Application Of The Ising Model, Juliano A. Everett
An Application Of The Ising Model, Juliano A. Everett
Publications and Research
Understanding how the Ising model works,what it represents, and how it can be applied to neurology. Given that an Ising model is an Entropy model that could be representative of the firing of neurons, some assumptions of the system are made and then the process is simulated through Monte Carlo methods.
Static Solid Relaxation Ordered Spectroscopy: SsRosy, Gregory S. Boutis, Ravinath Kausik
Static Solid Relaxation Ordered Spectroscopy: SsRosy, Gregory S. Boutis, Ravinath Kausik
Publications and Research
A twodimensional pulse sequence is introduced for correlating nuclear magnetic resonance anisotropic chemical shifts to a relaxation time (e.g., T1) in solids under static conditions. The sequence begins with a preparatory stage for measuring relaxation times, and is followed by a multiple pulse sequence for homonuclear dipolar decoupling. Data analysis involves the use of Fourier transform, followed by a onedimensional inverse Laplace transform for each frequency index. Experimental results acquired on solid samples demonstrate the general approach, and additional variations involving heteronuclear decoupling and magic angle spinning are discussed.
Biophysics In Applications, Marilyn R. Gunner
Biophysics In Applications, Marilyn R. Gunner
Open Educational Resources
No abstract provided.
On Different Parametrizations Of Feynman Integrals, Ray Daniel Sameshima
On Different Parametrizations Of Feynman Integrals, Ray Daniel Sameshima
Dissertations, Theses, and Capstone Projects
In this doctoral thesis, we discuss and apply advanced techniques for the calculations of scattering amplitudes which, on the one hand, allow us to compute cross sections and differential distributions at high precision and, on the other hand, give us deep mathematical insights on the mathematical structures of Feynman integrals.
We start by presenting phenomenological calculations relevant for the experimental analyses at the Large Hadron Collider. We use the resummation of soft gluon emission corrections to study the associated production of a top pair and a Z boson to nexttonexttoleading logarithmic accuracy, and compute the total cross section and differential ...
Inference Of Language Functional Network In Healthy, Cancerous And Bilingual Brains By Fmri And Network Modeling, Qiongge Li
Dissertations, Theses, and Capstone Projects
We study the underlying mechanism by which language processing occurs in the human brain using inference methods on functional magnetic resonance imaging data. The data analyzed stems from several cohorts of subjects; a monolingual group, a bilingual group, a healthy control group and one diseased case. We applied a complex statistical inference pipeline to determine the network structure of brain components involved with language. This healthy network reveals a fully connected triangular relationship between the preSupplementary Motor Area (preSMA), the Broca's Area (BA), and the ventral PreMotor Area (PreMA) in the left hemisphere. This "triangle'' shows consistently in all ...
Optical And Collective Properties Of Excitons In 2d Semiconductors, Matthew N. Brunetti
Optical And Collective Properties Of Excitons In 2d Semiconductors, Matthew N. Brunetti
Dissertations, Theses, and Capstone Projects
We study the properties of excitons in 2D semiconductors (2DSC) by numerically solving the Schr\"{o}dinger equation for an interacting electron and hole in the effective mass approximation, then calculating optical properties such as the transition energies, oscillator strengths, and absorption coefficients. Our theoretical approach allows us to consider both direct excitons in monolayer (ML) 2DSC and spatially indirect excitons in heterostructures (HS) consisting of two 2DSC MLs separated by fewlayer insulating hexagonal boron nitride (hBN). In particular, we study indirect excitons in TMDC HS, namely MoS_{2}, MoSe_{2}, WS_{2}, and WSe_{2}; both direct and ...
Stability And Application Of The KCore Dynamical Model To Biological Networks, Francesca Beatrice Arese Lucini
Stability And Application Of The KCore Dynamical Model To Biological Networks, Francesca Beatrice Arese Lucini
Dissertations, Theses, and Capstone Projects
The objective of the dissertation is to illustrate the importance of the kcore dynamical model, by first presenting the stability analysis of the nonlinear kcore model and compare its solution to the most widely used linear model. Second, I show a real world application of the kcore model to describe properties of neural networks, specifically, the transition from conscious to subliminal perception.
Physics And Mathematics Of Graded Quivers, Azeem Hasan
Physics And Mathematics Of Graded Quivers, Azeem Hasan
Dissertations, Theses, and Capstone Projects
A graded quiver with superpotential is a quiver whose arrows are assigned degrees c ∈ {0, 1, · · · , m}, for some integer m ≥ 0, with relations generated by a superpotential of degree m − 1. For m = 0, 1, 2, 3 they often describe the open string sector of Dbrane systems; in particular, they capture the physics of D(5 − 2m)branes at local CalabiYau (CY) (m + 2) fold singularities in type IIB string theory. We introduce mdimers, which fully encode the mgraded quivers and their superpotentials, in the case in which the CY (m + 2)folds are toric. A key result is ...
Sequential Discrimination Between NonOrthogonal Quantum States, Dov L. Fields
Sequential Discrimination Between NonOrthogonal Quantum States, Dov L. Fields
Dissertations, Theses, and Capstone Projects
The problem of discriminating between nonorthogonal states is one that has generated a lot of interest. This basic formalism is useful in many areas of quantum information. It serves as a fundamental basis for many quantum key distribution schemes, it functions as an integral part of other quantum algorithms, and it is useful in experimental settings where orthogonal states are not always possible to generate. Additionally, the discrimination problem reveals important fundamental properties, and is intrinsically related to entanglement. In this thesis, the focus is on exploring the problem of sequentially discriminating between nonorthogonal states. In the simplest version these ...
Coulomb Excitation And Transport Properties Of Monolayer Graphene And The AlphaT3 Lattice, Dipendra Dahal
Coulomb Excitation And Transport Properties Of Monolayer Graphene And The AlphaT3 Lattice, Dipendra Dahal
Dissertations, Theses, and Capstone Projects
In the past few years, I focused my attention in the study of 2D material's behavior, specifically graphene . We investigated several properties of graphene like transmission of particle through a potential barrier and demonstrated the effect of band gap to suppress the Klein tunneling at head on collision, we presented the results to get the criteria of negative refractive index and Klein tunneling through multiple barrier. Next, we have carried out the calculation of polarization function of graphene in the presence of magnetic field. The effect of integer Landau filling factor is shown and the portrayed results are presented ...
Yields Of Weakly Bound Light Nuclei As A Probe Of The Statistical Hadronization Model, Yiming Cai, Thomas D. Cohen, Boris A. Gelman, Yukari Yamauchi
Yields Of Weakly Bound Light Nuclei As A Probe Of The Statistical Hadronization Model, Yiming Cai, Thomas D. Cohen, Boris A. Gelman, Yukari Yamauchi
Publications and Research
The statistical hadronization model successfully describes the yields of hadrons and light nuclei from central heavyion collisions over a wide range of energies. It is a simple and efficient phenomenological framework in which the relative yields for very high energy collisions are essentially determined by a single model parameter—the chemical freezeout temperature. Recent measurements of yields of hadrons and light nuclei covering over nine orders of magnitudes from the ALICE collaboration at the Large Hadron Collider were described by the model with remarkable accuracy with a chemical freezeout temperature of 156.5 ± 1.5 MeV. A key physical question ...
Rocketry And Observability Predictions For Cubesat, Juliano A. Everett
Rocketry And Observability Predictions For Cubesat, Juliano A. Everett
Publications and Research
Estimating the visibility of Sunlight reflected by the holographic retroreflector of Cubesat Alpha, and to convert this to star apparent magnitude to learn more about the visibility of these sails through reflected sunlight, to in turn determine if glints of these holograms are visible by terrestrial observers.
Optimization Of Information Storage With Quantum Walks, Gui Zhen Lu
Optimization Of Information Storage With Quantum Walks, Gui Zhen Lu
School of Arts & Sciences Theses
A fourvertex quantum graph was analyzed with the objective of storing the highest ampli tude of an incoming qubit. The procedure included the use of phase shifters to allow the user to store and release information when he or she chooses. Several parameters, such as the phase shift, location of the phase shifter, the size and shape of the binding graph and initial incoming state were varied independently to optimize the storage capacity of the graph.
Nuclear Magnetic Resonance Characterization Of Dynamics In Novel Electrochemical Materials, Christopher T. Mallia
Nuclear Magnetic Resonance Characterization Of Dynamics In Novel Electrochemical Materials, Christopher T. Mallia
School of Arts & Sciences Theses
As our daily use of electronics and electronic technology grows, so does the societal need for sustainable, renewable and portable electrical power. To this end, materials of interest in the electrochemical world are needed to advance the frontier of battery science and energy storage technologies so that a safer, more efficient and reliable electrical future can be realized. This work focuses on characterization of materials primarily of interest for use as electrolytes in rechargeable LithiumIon Batteries (LIBs). Despite their extraordinary power, LIB application in certain fields, such as in electric vehicles, has been limited due to performance and safety concerns ...
Topological Insulating States In Photonics And Acoustics, Xiang Ni
Topological Insulating States In Photonics And Acoustics, Xiang Ni
Dissertations, Theses, and Capstone Projects
Recent surge of interest in topological insulators, insulating in their interior but conducting at the surfaces or interfaces of different domains, has led to the discovery of a variety of new topological states, and their topological invariants are characterized by numerous approaches in the category of topological band theory. The common features shared by topological insulators include, the topological phase transition occurs if the bulk bandgap is formed due to the symmetries reduction, the topological invariants exist characterizing the global properties of the material and inherently robust to disorder and continuous perturbations irrespective of the local details. Most importantly, these ...
Exploring A Practical Development Of Quantum Computing, Juliano A. Everett, Andrea N. Zambrano, Carlos Aguayza
Exploring A Practical Development Of Quantum Computing, Juliano A. Everett, Andrea N. Zambrano, Carlos Aguayza
Publications and Research
Tasked with describing a Quantum architecture (Superconducting loops), we additionally explored how the chosen architecture is used, developed, and how one could get started in understanding the way in which some quantum algorithms work with this architecture through Python and IBM's tools (Qiskit and IBM Q Experience).