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Articles 2221 - 2250 of 34096
Full-Text Articles in Entire DC Network
The Soundscape Of The Grove: The Acoustic Environment Of A Visual Landmark, Bryce Barrett
The Soundscape Of The Grove: The Acoustic Environment Of A Visual Landmark, Bryce Barrett
Honors Theses
The objective of this project was to evaluate the soundscape throughout the Grove and the Circle (two popular outdoor spaces on the University of Mississippi campus) by determining the sound levels and people’s perceptions of sounds. The term soundscape is defined by a person’s perception of an acoustic environment in context. The human perceptions of sounds were gathered during soundwalks, which are walking tours of a given environment where participants provide opinions on their acoustic surroundings. Five soundwalk sessions were conducted with a total of 10 participants with varying environmental conditions. Statistically significant variations in perceptions and sound levels …
Defects And Deformation In Passive And Active Structural Glasses, Julia Ann Giannini
Defects And Deformation In Passive And Active Structural Glasses, Julia Ann Giannini
Dissertations - ALL
Glasses and disordered granular media represent a class of materials that are quite familiar to us, from the glass in windows and phone screens, to piles of fruits, grains, and sand. Further, living and active systems such as cellular tissues, collections of robots, and even human crowds behave as disordered solids when they are gathered at high enough densities. Despite their ubiquity, there are still many behaviors of these amorphous systems that lack a full understanding. Contrasting crystalline solids, the thermodynamic, vibrational, energetic, and mechanical properties of glasses are not well-characterized by solid state theory. In the case of active …
Multimode Metamaterial Ring Resonator As An Entangling Bus For Artificial Atoms, Tianna Carroll
Multimode Metamaterial Ring Resonator As An Entangling Bus For Artificial Atoms, Tianna Carroll
Dissertations - ALL
Circuit quantum electrodynamics (cQED) systems with superconducting qubits coupled to linear microwave resonators are a prominent platform for realizing scalable quantum information processors. Combining cQED architectures with multimode resonators leads to a broad set of applications for performing analog quantum simulation, implementing dense quantum memory, and generating multimode entangled states between physically distant qubits. Microwave resonators in cQED are typically formed from distributed transmission lines that exhibit conventional dispersion with harmonic mode spacing; in such systems, usually only a single resonant mode can be strongly coupled to a qubit. Superconducting metamaterial resonators comprised of lumped circuit elements can be designed …
Investigating Holography Using Classical And Quantum Simulations, Goksu Can Toga
Investigating Holography Using Classical And Quantum Simulations, Goksu Can Toga
Dissertations - ALL
In this thesis, we aim to develop classical and quantum simulations to test holography. Holography can be thought of in its most basic form as a duality that relates a d + 1 dimensional theory to a d dimensional one and the most famous holographic correspondence is the AdS/CFT duality where d + 1 dimensional weakly coupled gravity theory is related to a d dimensional CFT. We start by developing lattice simulations for the N = 4 super Yang-Mills model and explore an improved supersymmetric lattice action showing that it is free of the lattice artifacts that plagued earlier lattice …
Overcoming Controls And Noise Challenges For High Power Interferometric Gravitational-Wave Detectors, Elenna Capote
Overcoming Controls And Noise Challenges For High Power Interferometric Gravitational-Wave Detectors, Elenna Capote
Dissertations - ALL
In August 2017, the Advanced LIGO and Advanced Virgo detectors made the first coincident detection of gravitational waves from a binary neutron star merger, GW170817. This multi-messenger detection, measured with both gravitational wave detectors and electromagnetic telescopes, emphasized the ability of ground-based gravitational-wave detectors to make exciting astrophysical discoveries that revolutionize understanding of the universe. In this new era of gravitational-wave astronomy, high detector sensitivity and reliable operation are required to enable more of these exciting detections. Ground-based gravitational-wave observatories are generally limited in sensitivity at low frequency by technical noise, at mid frequency by coating thermal noise, and at …
Entanglement With Neutral Atoms In The Simulation Of Nonequilibrium Dynamics Of One-Dimensional Spin Models, Anupam Mitra
Entanglement With Neutral Atoms In The Simulation Of Nonequilibrium Dynamics Of One-Dimensional Spin Models, Anupam Mitra
Physics & Astronomy ETDs
Quantum entanglement is a key ingredient for quantum information processing with capabilities beyond that of classical computation. We study the generation and role of entanglement in the dynamics of spin-1/2 models, both for the design of quantum gates for general-purpose quantum computation and for quantum simulation of interacting spin models. We introduce the neutral atom Mølmer-Sørensen gate, involving rapid adiabatic Rydberg dressing interleaved in a spin-echo sequence. We show its robustness to quasi-static experimental imperfections and favorable scaling with the time-energy scales of Rydberg-mediated entanglement generation. In quantum simulation, we consider critical behavior in quench dynamics of transverse field Ising …
Global Fits In The Supersymmetric Georgi-Machacek Model, Yingnan Xu
Global Fits In The Supersymmetric Georgi-Machacek Model, Yingnan Xu
Physics Theses and Dissertations
In this dissertation, we study a supersymmetric extension of the Standard Model with Higgs triplets in the scalar sector. We begin with a review of the Standard Model (SM), particularly the electroweak sector and the Higgs mechanism. In the SM, the Higgs mechanism requires the presence of a complex Higgs doublet to break the electroweak symmetry and endow particles with a mass; this process is called Spontaneous Symmetry Breaking (SSB). Although this is the simplest possibility, higher scalar representations may also contribute to the electroweak breaking process (EWSB). The extent to which these higher representations contribute to EWSB is constrained …
The Heavy Metal Survey: The Evolution Of Stellar Metallicities, Abundance Ratios, And Ages Of Massive Quiescent Galaxies Since Z ∼ 2, Aliza G. Beverage, Mariska Kriek, Katherine A. Suess, Charlie Conroy, Sedona H. Price, Guillermo Barro, Rachel Bezanson, Marijn Franx, Brian Lorenz, Yilun Ma, Lamiya A. Mowla, Imad Pasha, Pieter Van Dokkum, Daniel R. Weisz
The Heavy Metal Survey: The Evolution Of Stellar Metallicities, Abundance Ratios, And Ages Of Massive Quiescent Galaxies Since Z ∼ 2, Aliza G. Beverage, Mariska Kriek, Katherine A. Suess, Charlie Conroy, Sedona H. Price, Guillermo Barro, Rachel Bezanson, Marijn Franx, Brian Lorenz, Yilun Ma, Lamiya A. Mowla, Imad Pasha, Pieter Van Dokkum, Daniel R. Weisz
Pacific Faculty Work
We present the elemental abundances and ages of 19 massive quiescent galaxies at z ∼ 1.4 and z ∼ 2.1 from the Keck Heavy Metal Survey. The ultradeep LRIS and MOSFIRE spectra were modeled using a full-spectrum stellar population fitting code with variable abundance patterns. The galaxies have iron abundances between [Fe/H] = −0.5 and −0.1 dex, with typical values of −0.2 [−0.3] at z ∼ 1.4 [z ∼ 2.1]. We also find a tentative log σ v -[Fe/H] relation at z ∼ 1.4. The magnesium-to-iron ratios span [Mg/Fe] = 0.1-0.6 dex, with typical values of 0.3 [0.5] dex at …
Quantum Measurement: Theory And Practice, Andrew N. Jordan, Irfan A. Siddiqi
Quantum Measurement: Theory And Practice, Andrew N. Jordan, Irfan A. Siddiqi
Mathematics, Physics, and Computer Science Faculty Books and Book Chapters
This book adopts a novel, physics-first approach to quantum measurement, using physical experiments as the basis to describe the underlying mathematical formalism. Topics covered include weak measurements, quantum measurement reversal, quantum trajectories and the stochastic path integral formalism. The theory of quantum measurement is also covered in detail, including discussion of how it can be tested and demonstrated in a laboratory: how to build quantum-limited amplifiers, fundamental noise limits imposed on measurement by quantum mechanics, and the design of superconducting circuits. This text is an excellent introduction for students with a basic understanding of quantum mechanics wanting to learn more …
Removal Of Phenol From Oilfield Produced Water Using Non-Conventional Adsorbent Medium By An Eco-Friendly Approach, Salem Jawad Alhamd, Mohammed Nsaif Abbas, Hassan Jameel Jawad Al-Fatlawy, Thekra Atta Ibrahim, Zaid Nsaif Abbas
Removal Of Phenol From Oilfield Produced Water Using Non-Conventional Adsorbent Medium By An Eco-Friendly Approach, Salem Jawad Alhamd, Mohammed Nsaif Abbas, Hassan Jameel Jawad Al-Fatlawy, Thekra Atta Ibrahim, Zaid Nsaif Abbas
Karbala International Journal of Modern Science
Petroleum extraction generates substantial quantities of produced water, a challenge compounded by water scarcity in oil-producing regions, notably the Middle East. Leveraging produced water effectively, adhering to environmental standards, can offer a viable solution to the issue of water scarcity. This study explores the potential of mandarin peels as an available, cost-effective adsorbent for treating synthetic aqueous solution simulated to oil-field produced water, specifically targeting phenol, a dangerous pollutant. Employing a batch-mode adsorption unit, six operational factors—phenol concentration, acidity, agitation speed, contact time, adsorbent dose, and temperature—were investigated. Results revealed an inverse relationship between phenol removal and pH, concentration, and …
Motion History Images: A New Method For Tracking Microswimmers In 3d, Max Riekeles, Hadi Albalkhi, Megan Marie Dubay, Jay Nadeau, Christian A. Lindensmith
Motion History Images: A New Method For Tracking Microswimmers In 3d, Max Riekeles, Hadi Albalkhi, Megan Marie Dubay, Jay Nadeau, Christian A. Lindensmith
Physics Faculty Publications and Presentations
Quantitative tracking of rapidly moving micron-scale objects remains an elusive challenge in microscopy due to low signal-to-noise. This paper describes a novel method for tracking micron-sized motile organisms in off-axis Digital Holographic Microscope (DHM) raw holograms and/or reconstructions. We begin by processing the microscopic images with the previously reported Holographic Examination for Life-like Motility (HELM) software, which provides a variety of tracking outputs including motion history images (MHIs). MHIs are stills of videos where the frame-to-frame changes are indicated with color time-coding. This exposes tracks of objects that are difficult to identify in individual frames at a low signal-to-noise ratio. …
Development Of The Xl-Calibur Hard X-Ray Polarimetry Mission And Insights Into Blazar Markarian 501 Through X-Ray Polarimetric Observations With The Imaging X-Ray Polarimetry Explorer (Ixpe), Lindsey Lisalda
Arts & Sciences Graduate Student Theses and Dissertations
X-ray polarimetry is a new tool for exploring the geometries and underlying physical processes at work in cosmic X-ray sources. This thesis focuses on the roles of two X-ray polarimetry missions, IXPE and XL-Calibur, to measure the polarization of the X-rays from black holes and neutron stars. By covering a wide energy range, 2-8 keV for IXPE and 15-80 keV for XL-Calibur, and utilizing different measurement techniques, these missions offer complementary insights into the physics of compact X-ray sources. Both missions are suited to study the X-rays emitted by the jets of AGNs and blazars, which are often polarized due …
Infrared Magneto-Spectroscopy Of Correlated Electron Systems In Graphene, Yashika Kapoor
Infrared Magneto-Spectroscopy Of Correlated Electron Systems In Graphene, Yashika Kapoor
Arts & Sciences Graduate Student Theses and Dissertations
Van der Waals (vdW) heterostructures represent a novel class of artificial materials created by layering atomically thin planar crystals and offer a promising platform for band structure engineering. Here, we focus on a vdW heterostructure of monolayer graphene (G) coupled to a hexagonal boron nitride (h-BN). We utilize cyclotron resonance (CR) spectroscopy as a primary investigative tool for probing the interacting Dirac fermions in graphene. This work presents a system capable of conducting broadband far- to mid-infrared CR spectroscopy in high magnetic fields and ultra-low temperatures. Our study investigates the influence of the h-BN substrate on the properties of graphene …
A Turn-Off Fluorescent Sensor For Metal Ions Quantifies Corrosion In An Organic Solvent, Lianlian Liu, Zechariah Pfaffenberger, Mark Siegel, Anuj Saini, Lydia Kisley
A Turn-Off Fluorescent Sensor For Metal Ions Quantifies Corrosion In An Organic Solvent, Lianlian Liu, Zechariah Pfaffenberger, Mark Siegel, Anuj Saini, Lydia Kisley
Faculty Scholarship
We demonstrate that the corrosion of AISI 1045 medium carbon steel and pure aluminum can be quantified by the turn-off fluorescent sensor Phen Green-SK (PGSK) in ethanol-based solutions. We first evaluate the dependence of the chelation enhanced quenching of PGSK on iron and aluminum ion concentrations. Subsequently, we apply PGSK to examine the anodic dissolution of metal corrosion. The observed time-dependent PGSK-quenching quantifies the corrosion rates of two metals over 24 h of immersion in ethanol-based solutions. The PGSK-based quantification of corrosion is compared to scanning electron microscopy and electrochemical techniques, including open circuit potential and Tafel extrapolation. The corrosion …
Supercontinuum Generation With A Ti: Sapphire Laser And Photonic Crystal Fiber, Joseph Lange
Supercontinuum Generation With A Ti: Sapphire Laser And Photonic Crystal Fiber, Joseph Lange
Celebrating Scholarship and Creativity Day (2018-)
A broad spectrum of visible light was produced by focusing the 50-fs, 800-nm, 5-nJ pulses from an unamplified Ti:sapphire laser into a 20-cm-long photonic crystal fiber. A prism pair was used to compensate for material dispersion of the system. Different focusing methods were investigated including beam telescopes and lenses of various focal lengths. A 3X beam expander telescope near the laser output and a 3-cm focal length achromatic lens after the prism pair were found to work best for coupling the light into the fiber which has a core diameter of 1.7 μm.
Nanograv 15-Year Gravitational-Wave Background Methods, Aaron D. Johnson, Patrick M. Meyers, Paul T. Baker, Neil J. Cornish, Jeffrey S. Hazboun, Tyson B. Littenberg, Joseph D. Romano, Stephen R. Taylor, Michele Vallisneri
Nanograv 15-Year Gravitational-Wave Background Methods, Aaron D. Johnson, Patrick M. Meyers, Paul T. Baker, Neil J. Cornish, Jeffrey S. Hazboun, Tyson B. Littenberg, Joseph D. Romano, Stephen R. Taylor, Michele Vallisneri
Physics & Astronomy Faculty Publications
Pulsar timing arrays (PTAs) use an array of millisecond pulsars to search for gravitational waves in the nanohertz regime in pulse time of arrival data. This paper presents rigorous tests of PTA methods, examining their consistency across the relevant parameter space. We discuss updates to the 15-year isotropic gravitational-wave background analyses and their corresponding code representations. Descriptions of the internal structure of the flagship algorithms enterprise and ptmcmcsampler are given to facilitate understanding of the PTA likelihood structure, how models are built, and what methods are currently used in sampling the high-dimensional PTA parameter space. We introduce a novel version …
Reed Research Reactor Neutron Beam Characterization And Analysis, Vee Bartko, Jerry Newhouse
Reed Research Reactor Neutron Beam Characterization And Analysis, Vee Bartko, Jerry Newhouse
Student Research Symposium
Using neutron activation analysis of 99% pure gold foils, the authors characterize the neutron dose and shape of the neutron beam at the Reed Research Reactor (RRR). The experimental procedure followed extensive modeling in Monte Carlo N-Particle (MCNP) and Tool for Particle Simulation (TOPAS) simulations, in which the beam was projected to be roughly collimated. The shape, defined in terms of neutron flux, was measured by placing the foils directly on top of the neutron beam cap at powers of 1, 5, and 10 kilowatts. The flux was then converted to neutron dose via the Nuclear Regulatory Commission's neutron fluence …
Going Down An Incline With Chatgpt, Corey R. Sissons
Going Down An Incline With Chatgpt, Corey R. Sissons
Student Research Symposium
In our Large Language Model (LLM) research, examining ChatGPT 4, we devised a physics problem involving an object descending an inclined plane. Through variations in terminology such as "rolling," "sliding," "solid sphere," "hollow sphere," "wooden ramp," "no-slip ramp," and more, we sought to evaluate LLM responses for different scenarios. Our analysis aimed to discern whether the LLM’s answers exhibited expertise in the field of physics. This experiment sheds light on LLM’s ability to give accurate and precise physics answers as well as variation in responses to nuanced changes in problem formulation. This provides valuable insights into its proficiency and potential …
Development Of A Two-Photon Laser Scanning Microscope, Jess Hollenbaugh
Development Of A Two-Photon Laser Scanning Microscope, Jess Hollenbaugh
Student Research Symposium
The objective of this project was to convert a Sarastro 2000 confocal laser scanning microscope into a system capable of imaging using two-photon excitation (TPE) fluorescence for the use of the PSU biology department. TPE microscopy operates on the ability of fluorophores to accept two photons each with half the energy of a desired transition in a single quantum event via a virtual energy state and then emit a higher energy photon upon relaxation. This is preferable to single-photon excitation (SPE) due to the lower energy photons causing less damage to delicate biological samples. The adaptation process included physically altering …
Neutron Time Of Flight Spectrometry As A Diagnostic Tool For Inertial Electrostatic Confinement Fusion Plasmas, Andrew H. Dempsey, Erik J. Sanchez
Neutron Time Of Flight Spectrometry As A Diagnostic Tool For Inertial Electrostatic Confinement Fusion Plasmas, Andrew H. Dempsey, Erik J. Sanchez
Student Research Symposium
Inertial electrostatic confinement (IEC) is a method for achieving fusion of light nuclei wherein ions are injected into a spherically symmetric system of concentric electrodes. When the innermost electrode is held at negative high voltage with respect to the outer electrode, ions injected into the reactor at cathode (ground) potential accelerate toward the anode where they may undergo collisions with sufficient energy to overcome Coulomb repulsion and achieve nuclear fusion. The most commonly used IEC fusion fuels are deuterium-deuterium (D-D) and deuterium-tritium (D-T). Both fuels undergo fusion reactions that result in production of fast neutrons with distinct energies. Neutron production …
Development Of A Fast-Neutron Source Localization System, Abdulsalam F. Al Mutairi
Development Of A Fast-Neutron Source Localization System, Abdulsalam F. Al Mutairi
Student Research Symposium
Power generation by nuclear fusion is a continuing ambition that has been the focus of nuclear fusion research for nearly a hundred years. However, small-scale fusion reactors have further propulsion and neutron imaging applications that don’t require greater than breakeven efficiencies that a fusion energy source needs. Inertial Electrostatic Confinement (IEC) fusion devices have the potential for miniaturization, making them a strong candidate for such applications. Yet the contributions of different interactions within an IEC fusion device are still not fully understood. Imaging an IEC device and investigating each interaction's Neutron Production Rate (NPR) can enhance design efficiency. Neutron imaging …
Synergistic Exploration Of Spin Glass Physics And Optimization Algorithm Design, Mutian Shen
Synergistic Exploration Of Spin Glass Physics And Optimization Algorithm Design, Mutian Shen
Arts & Sciences Graduate Student Theses and Dissertations
In the past decades, enormous effort has been devoted to the study of low-temperature spin glasses. The undertaken approaches were primarily of two different types. On one hand, various theoretical pictures aimed to capture the essence and rationalize the quintessential physical features of spin glass systems. On the other hand, much work was spent on the design of various algorithms in the hope of finding efficient numerical methods for calculating the ground state or sampling excited states. The latter endeavor has ramifications in fields far beyond those of spin glasses (such as in optimization problems, biology, and the study of …
Synthesis Of High-Quality Cost Effective Zno Nanorods For Photovoltaic Applications, Ghusoon Jalil Ibrahim Al Bazzar
Synthesis Of High-Quality Cost Effective Zno Nanorods For Photovoltaic Applications, Ghusoon Jalil Ibrahim Al Bazzar
Theses and Dissertations
Due to its outstanding structural, optical, and electrical properties, zinc oxide (ZnO) has received considerable attention from researchers. Even though there is a high demand for functional devices involving ZnO films and nanostructures, synthesizing devices comprising ZnO nanostructures requires expensive and time-consuming techniques that have limited their viability for comprehensive applications. Thus, there is a high demand for high-quality, cost-effective ZnO nanostructures. We have optimized the simple, low-cost, and time-efficient electrochemical deposition (ECD) technique to successfully synthesize high-quality vertically aligned ZnO nanorods to bridge this gap between fundamental and applied research. Characterization of their structural properties through x-ray diffraction and …
Simulating Cross-Scale Solid-Fluid Interaction Phenomena, Jinyuan Liu
Simulating Cross-Scale Solid-Fluid Interaction Phenomena, Jinyuan Liu
Dartmouth College Ph.D Dissertations
Solid-fluid interactions are ubiquitous in nature, and accurate simulation methods are essential for realistic animation, industrial design, and engineering analysis. Com- pared to large-scale coupling phenomena, simulating fine-scale interactions poses extra challenges due to factors such as surface tension, material wettability, and geometric complexity. In this thesis, we pursue novel methodologies to accurately model in- terfacial dynamics between surface-tension fluids and codimensional solids, involving capillary interactions, controllable wettability, and robust contact behaviors. Our ini- tial approach involves developing a novel three-way coupling method, which utilizes a thin liquid membrane, modelled as a simplicial mesh, to facilitate accurate momen- tum transfer, …
Flavor Equilibration In Neutron Star Mergers, Ziyuan Zhang
Flavor Equilibration In Neutron Star Mergers, Ziyuan Zhang
Arts & Sciences Graduate Student Theses and Dissertations
Neutron star mergers probe the high-density and high-temperature regime of dense mat- ter. The mergers can reach several times saturation density, and their temperatures can reach up to a hundred MeV. Simulations are essential for a better understanding of dense matter physics and for comparing theoretical predictions with observations. Current merger simulations, based on numerical general relativity and hydrodynamics, lack microphysical inputs. Therefore, the goal of the thesis is to develop models and provide microphysical insights for the theory community and the merger simulation community. Specifically, it includes the state-of-the-art study on flavor equilibration under neutron star merger con- ditions. …
Creating An Interdisciplinary Learning Community Between Two Cross-Departmental Courses, Krista Mcbride, Maggie Monteverde
Creating An Interdisciplinary Learning Community Between Two Cross-Departmental Courses, Krista Mcbride, Maggie Monteverde
Faculty Scholarship Symposium
An Interdisciplinary Learning Community (ILC) consisting of two cross-departmental general education courses has been created. Advantages to linking these courses will be presented. Further, the assignments and course material used to make this learning community successful will be presented. Challenges to developing and evaluating shared assignments for such linked classes will also be discussed. Finally, student feedback will be shown from students enrolled in these courses, which illustrate the positive effects blending these two classes had on the student’s learning experience. As an example, an ILC between a general physics course and a literature course will be introduced.
Optical Tweezers Explorations: Dna-Mitoxantrone Interactions At 20pn, Heléna Kathryn Beeloo
Optical Tweezers Explorations: Dna-Mitoxantrone Interactions At 20pn, Heléna Kathryn Beeloo
Honors Program Theses and Projects
Mitoxantrone is a chemotherapy drug that treats a variety of cancers by inhibiting cancer cell replication through intercalation with DNA. Intercalation is the process by which certain small molecules slide flat planar regions in their structure between the base pairs of DNA. This increases the stacking force in the DNA double helix, preventing DNA replication by increasing the force required to separate the two strands that compose the helix. In this study, dual-beam optical tweezers were used to determine the binding kinetics and dissociation constant of Mitoxantrone to single molecules of DNA at 20 pN of force. This study utilized …
The Faint Satellite System Of Ngc 253: Insights Into Low-Density Environments And No Satellite Plane, Burçin Mutlu-Pakdil, David J. Sand, Denija Crnojević, Paul Bennet, Michael G. Jones, Kristine Spekkens, Ananthan Karunakaran, Dennis Zaritsky, Nelson Caldwell, Catherine E. Fielder, Puragra Guhathakurta, Anil C. Seth, Joshua D. Simon, Jay Strader, Elisa Toloba
The Faint Satellite System Of Ngc 253: Insights Into Low-Density Environments And No Satellite Plane, Burçin Mutlu-Pakdil, David J. Sand, Denija Crnojević, Paul Bennet, Michael G. Jones, Kristine Spekkens, Ananthan Karunakaran, Dennis Zaritsky, Nelson Caldwell, Catherine E. Fielder, Puragra Guhathakurta, Anil C. Seth, Joshua D. Simon, Jay Strader, Elisa Toloba
Pacific Faculty Work
We have conducted a systematic search around the Milky Way (MW) analog NGC 253 (D = 3.5 Mpc), as a part of the Panoramic Imaging Survey of Centaurus and Sculptor (PISCeS)—a Magellan+Megacam survey to identify dwarfs and other substructures in resolved stellar light around MW-mass galaxies outside of the Local Group. In total, NGC 253 has five satellites identified by PISCeS within 100 kpc with an absolute V-band magnitude of M V < −7. We have additionally obtained deep Hubble Space Telescope imaging of four reported candidates beyond the survey footprint: Do III, Do IV, and dw0036m2828 are confirmed to be satellites of NGC 253, while SculptorSR is found to be a background galaxy. We find no convincing evidence for the presence of a plane of satellites surrounding NGC 253. We construct its satellite luminosity function, which is complete down to M V ≲ −8 out to 100 kpc and MV ≲ −9 out to 300 kpc, and compare it to those calculated for other Local Volume galaxies. Exploring trends in satellite counts and star-forming fractions among satellite systems, we find relationships with host stellar mass, environment, and morphology, pointing to a complex picture of satellite formation, and a successful model has to reproduce all of these trends.
New Quantum Information Science Study At Bsu: A Theoretical Study And Research Towards Pic Generation Of Entangled Photons, Peyton Brown
New Quantum Information Science Study At Bsu: A Theoretical Study And Research Towards Pic Generation Of Entangled Photons, Peyton Brown
Honors Program Theses and Projects
The first part of this thesis explores the abstract quantum state vector space using Dirac formalism, providing a comprehensive analysis of quantum mechanics’ fundamental concepts. Emphasis is placed on the Dirac notation’s pivotal role in elucidating quantum phenomena such as superposition and entanglement. Through detailed examinations of quantum states, polarization, and the CHSH inequality, this study not only reinforces the theoretical foundations of quantum information science but also demonstrates its practical applications in quantum information and quantum computing. The discussion delves into the manipulation of qubits and quantum gates, showing the potential of quantum information theory in enhancing computational efficiencies …
The Rubidium Magneto-Optical Trap: Designing A Robust System For Measurement & Control, Thomas Melody
The Rubidium Magneto-Optical Trap: Designing A Robust System For Measurement & Control, Thomas Melody
Honors Program Theses and Projects
This thesis is a culmination of our efforts to construct a robust and flexible opto-mechanical system to fully deliver and control all of the parameters related to the required laser wavelength, polarization, power, beam size, and directionality for both the pump and the re-pump laser beams, delivered from two different lasers, necessary for neutral-atom laser trapping and cooling. This is an extension of the neutral Rubidium Magneto-Optical Trap (MOT) at BSU which afford a macroscopic scale collection of cold atoms where the effective governing laws of physics are quantum in nature rather than classical. My predecessors had done work on …