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Articles 1351 - 1380 of 36527
Full-Text Articles in Physical Sciences and Mathematics
New Physics In The Age Of Precision Cosmology, Vivian I. Sabla
New Physics In The Age Of Precision Cosmology, Vivian I. Sabla
Dartmouth College Ph.D Dissertations
The Lambda-cold dark matter (LCDM) model has become the standard model of cosmology because of its ability to reproduce a vast array of cosmological observations, from the earliest moments of our Universe, to the current period of accelerated expansion, which it does with great accuracy. However, the success of this model only distracts from its inherent flaws and ambiguities. LCDM is purely phenomenological, providing no physical explanation for the nature of dark matter, responsible for the formation and evolution of large-scale structure, and giving an inconclusive explanation for dark energy, which drives the current period of accelerated expansion.
Furthermore, cracks …
Analysis And Methodology Of Helical And Flexible Homopolymer Monte Carlo Simulations, Nathan Roberts
Analysis And Methodology Of Helical And Flexible Homopolymer Monte Carlo Simulations, Nathan Roberts
Honors College Theses
The purpose of my work is to analyze the results of Monte Carlo simulations of various types of polymers: a helical homopolymer and a flexible homopolymer. Specific applications of Monte Carlo polymer simulations and parallel tempering replica exchanges are presented. Using temporal analysis, I aim to measure the efficiency of each type of simulation as it relates to equilibration time. For the helical homopolymer model, equilibration time is expanded upon to analyze the rate of structure generation and relevant hyper-phase diagram. Stable states for helical homopolymers will use data generated from parallel tempering replica exchange Monte Carlo simulations created by …
"In The Beginning, God Created Atoms", Samiya L. Henry
"In The Beginning, God Created Atoms", Samiya L. Henry
Undergraduate Research and Scholarship Symposium
Genesis 1:1 states “In the beginning, God created the heavens and the earth.” This is the defining statement in the Bible and acts as the foundation of creation and God’s power in the Christian faith. On the other hand, many scientists believe the Big Bang Theory and the discoveries made in other fields of science solely define the creation of the universe and explain life as we know it, also disproving the Christian creation story and the overall existence of God. However, the exact opposite is true; God is science.
Alone, neither of these concepts (faith and science) fully solve …
Volume 14, Ireland Seagle, Dalton C. Whitby, Cassandra Poole, Rachel Cannon, Heidi Parker-Combes, Devon G. Shifflett, Antonio Harvey
Volume 14, Ireland Seagle, Dalton C. Whitby, Cassandra Poole, Rachel Cannon, Heidi Parker-Combes, Devon G. Shifflett, Antonio Harvey
Incite: The Journal of Undergraduate Scholarship
Table of Contents:
- Introduction: Dr. Amorette Barber
- From the Editor: Dr. Larissa "Kat" Tracy
- From the Designers: Rachel English, Rachel Hanson
- Hungry Like the Wolf: The Wolf as Metaphor in Paramount Network’s Yellowstone: Ireland Seagle
- “Floating Cities”: Illustrating the Commercial and Conservation Conflict of Alaskan Cruise Ship Tourism: Dalton C. Whitby
- What Can You Do When Your Genes are the Enemy? Current Applications of Gene Manipulation and the Associated Ethical Considerations: Cassandra Poole
- La doble cara: un tema romántico en las obras de Larra y Hawthorne: Rachel Cannon
- Resolving a Conflict: How to …
Applying Bioactive Glass Beads For Long-Term Drug Delivery, Marie O. Sykes, Rashi Sharma
Applying Bioactive Glass Beads For Long-Term Drug Delivery, Marie O. Sykes, Rashi Sharma
Physics and Astronomy Presentations
Bioactive glass beads have been used to distribute medicine over extended periods of time in limited uses. They can be engineered to have a porous and hollow structure, and using Mo-Sci's OL-GL 1756b (1756b), the fundamental notion of dosage distribution can be tested in preparation to design the optimal glass for medicine distribution. A few key factors in this is how long does it take the liquid to release from the beads, how do the beads decay, and how well the glass can bond to human tissue. This research demonstrates the capacities of the 1756b type as a promising start …
Magnetic Slime, Admin Stem For Success
Magnetic Slime, Admin Stem For Success
STEM for Success Showcase
Students learn chemistry and physics by making magnetic slime.
Goonie Shooters Activity, Admin Stem For Success
Goonie Shooters Activity, Admin Stem For Success
STEM for Success Showcase
Students are asked to design a "Goon Shooter" to launch "goons" as far as possible.
Sleigh Race Project, Admin Stem For Success
Sleigh Race Project, Admin Stem For Success
STEM for Success Showcase
Students use their knowledge of physics and design to build both a sleigh and a slope for the sleigh to travel on.
Basketballs And Energy, Admin Stem For Success
Basketballs And Energy, Admin Stem For Success
STEM for Success Showcase
No abstract provided.
Nail Steam Activity, Admin Stem For Success, Natalie Wilson
Nail Steam Activity, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Activity where students use nails to practice concepts relating to center of gravity
Rubber Band Car Activity, Admin Stem For Success, Natalie Wilson
Rubber Band Car Activity, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Student learn about forces and engineering by designing a car powered by rubber bands
Money And Energy, Admin Stem For Success, Natalie Wilson
Money And Energy, Admin Stem For Success, Natalie Wilson
STEM for Success Showcase
Money is related to physics concepts to teach students about work, potential energy and conservation of energy
Magnetism Activity, Admin Stem For Success
Magnetism Activity, Admin Stem For Success
STEM for Success Showcase
This interactive activity teaches students about magnetism.
Tailoring The Polyurethane Foam/Rgo/Batio3 Pressure Sensor For Human Activities, Mohamed Morsy
Tailoring The Polyurethane Foam/Rgo/Batio3 Pressure Sensor For Human Activities, Mohamed Morsy
Nanotechnology Research Centre
No abstract provided.
Femtotesla Magnetometry And Nanoscale Imaging With Color Centers In Diamond, Yaser Silani
Femtotesla Magnetometry And Nanoscale Imaging With Color Centers In Diamond, Yaser Silani
Optical Science and Engineering ETDs
Intriguing photophysical properties of color centers in diamond make them ideal candidates for many applications from imaging and sensing to quantum networking. In the first part of this work, we have studied the silicon vacancy (SiV) centers in diamond for nanoscale imaging applications. We showed that these centers are promising fluorophores for Stimulated Emission Depletion (STED) microscopy, owing to their photostable, near-infrared emission and favorable photophysical properties. In the second part, we built a femtotesla Radio-Frequency (RF) magnetometer based on the diamond nitrogen vacancy (NV) centers and magnetic flux concentrators. We used this sensor to remotely detect Nuclear Quadrupole Resonance …
Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well, Jie Chen, Simeon I. Mistakidis, Peter Schmelcher
Dynamical Formation Of Two-Fold Fragmented Many-Body State Induced By An Impurity In A Double-Well, Jie Chen, Simeon I. Mistakidis, Peter Schmelcher
Physics Faculty Research & Creative Works
We Unravel The Correlated Quantum Quench Dynamics Of A Single Impurity Immersed In A Bosonic Environment Confined In An One-Dimensional Double-Well Potential. A Particular Emphasis Is Placed On The Structure Of The Time-Evolved Many-Body (MB) Wave Function By Relying On A Schmidt Decomposition Whose Coefficients Directly Quantify The Number Of Configurations That Are Macroscopically Populated. For A Non-Interacting Bosonic Bath And Weak Postquench Impurity-Bath Interactions, We Observe The Dynamical Formation Of A Two-Fold Fragmented MB State Which Is Related To Intra-Band Excitation Processes Of The Impurity And Manifests As A Two-Body Phase Separation (Clustering) Between The Two Species For Repulsive …
Calibrating The Faraday Cup For Ion Beams Using Rutherford Backscattering Spectroscopy, Joseph Fogt, Nolan Miles, Megan Haeussler, Hope Weeda
Calibrating The Faraday Cup For Ion Beams Using Rutherford Backscattering Spectroscopy, Joseph Fogt, Nolan Miles, Megan Haeussler, Hope Weeda
22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)
Particle accelerators are useful pieces of technology for a variety of experiments, from testing for contaminants in the water supply to testing the durability of materials exposed to radiation. In order to measure the amount of radiation being delivered by the accelerator’s beam, a Faraday cup is used. This tool can measure the amount of ions impacting a surface by measuring the current generated by the incident ions; however, they often overestimate current due to the emission of secondary electrons. This is an inherent property of the Faraday cup, but we still want an accurate measurement of the beam current. …
Effects Of Autoionizing Resonances On Wave-Packet Dynamics Studied By Time-Resolved Photoelectron Spectroscopy, Pengju Zhang, Van Hung Hoang, Chuncheng Wang, Tran Trung Luu, Vít Svoboda, Anh-Thu Le, Hans Jakob Wörner
Effects Of Autoionizing Resonances On Wave-Packet Dynamics Studied By Time-Resolved Photoelectron Spectroscopy, Pengju Zhang, Van Hung Hoang, Chuncheng Wang, Tran Trung Luu, Vít Svoboda, Anh-Thu Le, Hans Jakob Wörner
Physics Faculty Research & Creative Works
We Report a Combined Experimental and Theoretical Study on the Effect of Autoionizing Resonances in Time-Resolved Photoelectron Spectroscopy. the Coherent Excitation of N2 by ∼14.15 EV Extreme-Ultraviolet Photons Prepares a Superposition of Three Dominant Adjacent Vibrational Levels (V′=14-16) in the Valence B′ ςu+1 State, Which Are Probed by the Absorption of Two or Three Near-Infrared Photons (800 Nm). the Superposition Manifests itself as Coherent Oscillations in the Measured Photoelectron Spectra. a Quantum-Mechanical Simulation Confirms that Two Autoionizing Rydberg States Converging to the Excited a Π2u and B ςu+2 N2+ Cores Are Accessed by the Resonant Absorption of …
For The Dissertation: A Classification Of Tensors In Ecsk Theory, Joshua James Leiter, Charles G. Torre
For The Dissertation: A Classification Of Tensors In Ecsk Theory, Joshua James Leiter, Charles G. Torre
Physics Student Research
This dissertation presents a Petrov/Plebanski/Segre/Algebraic (PPSA) classification scheme for both the curvature and torsion tensors in Einstein-Cartan-Sciama-Kibble theory (ECSK); additionally the work includes a software package in Maple with computational and PPSA classification tools. Six different solutions are classified using the new software tools developed. We also present a new boundary term for ECSK-NMC scalar theory to ensure Dirichlet boundary conditions. New work completed includes the decomposition of an arbitrary 4th rank tensor under SO (p, q), equivalent SL (2, C) irreducible spinor decompositions of arbitrary 3rd and 4th rank tensors. We provide new proofs that the corresponding spinors are …
Non-Hermitian Edge Burst Without Skin Localization, Cem Yuce, Hamidreza Ramezani
Non-Hermitian Edge Burst Without Skin Localization, Cem Yuce, Hamidreza Ramezani
Physics and Astronomy Faculty Publications and Presentations
In a class of non-Hermitian quantum walk in lossy lattices with open boundary conditions, an unexpected peak in the distribution of the decay probabilities appears at the edge, referred to as an edge burst. It is proposed that the edge burst originates jointly from the non-Hermitian skin effect (NHSE) and the imaginary gaplessness of the spectrum [W.-T. Xue et al., Phys. Rev. Lett. 128, 120401 (2022)]. Using a particular one-dimensional lossy lattice with a nonuniform loss rate, we show that the edge burst can occur even in the absence of skin localizations. Furthermore, we discuss that the edge …
The Spin Polarization Of Palladium On Magneto-Electric Cr2O3, Takashi Komesu, Will Echtenkamp,, Christian H. Binek, Peter A. Dowben
The Spin Polarization Of Palladium On Magneto-Electric Cr2O3, Takashi Komesu, Will Echtenkamp,, Christian H. Binek, Peter A. Dowben
Department of Physics and Astronomy: Faculty Publications
While induced spin polarization of a palladium (Pd) overlayer on antiferromagnetic and magneto-electric Cr2O3(0001) is possible because of the boundary polarization at the Cr2O3(0001), in the single domain state, the Pd thin film appears to be ferromagnetic on its own, likely as a result of strain. In the conduction band, we find the experimental evidence of ferromagnetic spin polarized in Pd thin films on a Cr2O3(0001) single crystal, especially in the thin limit, Pd thickness of around 1–4 nm. Indeed there is significant spin polarization in 10 Å …
Telescope Restoration, Aidan Tueller
Telescope Restoration, Aidan Tueller
Student Research Symposium
In partnership with Dr. Jan Sojka, head of the Physics Department, a plan was created to make the telescope on top of the Engineering Lab building operational again for either staff, students, classes, or labs to use. The telescope was purchased through funds by Utah NASA Space Grant Consortium. This presentation will give a recap of how the restoration went and plans for future use of the telescope.
New Aspects Of Scattering Amplitudes, Higher-K Amplitudes, And Holographic Quark Gluon Plasmas, Bruno Giménez Umbert
New Aspects Of Scattering Amplitudes, Higher-K Amplitudes, And Holographic Quark Gluon Plasmas, Bruno Giménez Umbert
Electronic Thesis and Dissertation Repository
We present new results on different aspects of quantum field theory, which are divided into three main parts. In part I, we find and prove a new behavior of massless tree-level scattering amplitudes, including the biadjoint scalar theory, the U(N) non-linear sigma model, and the special Galileon, within specific subspaces of the kinematic space. We also derive new formulas for the double-ordered biadjoint scalar and $\phi^p$ amplitudes, which can be obtained as integrals over the positive tropical Grassmannian and under limiting procedures on the kinematic invariants. This reveals surprising connections with cubic amplitudes. We also present alternative versions of the …
E6 Models In Light Of Precision MW Measurements, Vernon Barger, Cash Hauptmann, Peisi Huang, Wai-Yee Keung
E6 Models In Light Of Precision MW Measurements, Vernon Barger, Cash Hauptmann, Peisi Huang, Wai-Yee Keung
Department of Physics and Astronomy: Faculty Publications
We propose a solution to the recent W mass measurement by embedding the Standard Model within E6 models. The presence of a new U(1) group shifts the W boson mass at the tree level and introduces a new gauge boson Z' which has been searched for at collider experiments. In this article, we identify the parameter space that explains the new W mass measurement and is consistent with current experimental Z' searches. As U(1) extensions can be accommodated in supersymmetric models, we also consider the supersymmetric scenario of E6 models, and show that a 125 GeV …
A Menagerie Of Symmetry Testing Quantum Algorithms, Margarite Lynn Laborde
A Menagerie Of Symmetry Testing Quantum Algorithms, Margarite Lynn Laborde
LSU Doctoral Dissertations
In Chapter 1, we establish the mathematical background used throughout this thesis. We review concepts from group and representation theory. We further establish fundamental concepts from quantum information. This will allow us to then define the different notions of symmetry necessary in the following chapters. In Chapter 2, we investigate Hamiltonian symmetries. We propose quantum algorithms capable of testing whether a Hamiltonian exhibits symmetry with respect to a group. Furthermore, we show that this algorithm is that this algorithm is DQC1-Complete. Finally, we execute one of our symmetry-testing algorithms on existing quantum computers for simple examples. In Chapter 3, we …
The Camels Project: Public Data Release, Francisco Villaescusa-Navarro, Shy Genel, Daniel Anglés-Alcázar, Lucia A. Perez, Pablo Villanueva-Domingo, Digvijay Wadekar, Helen Shao, Faizan G. Mohammad, Sultan Hassan, Emily Moser, Erwin T. Lau, Luis Fernando Machado Poletti Valle, Andrina Nicola, Leander Thiele, Yongseok Jo, Oliver H.E. Philcox, Benjamin D. Oppenheimer, Megan Tillman, Chang Hoon Hahn, Neerav Kaushal, Et Al.
The Camels Project: Public Data Release, Francisco Villaescusa-Navarro, Shy Genel, Daniel Anglés-Alcázar, Lucia A. Perez, Pablo Villanueva-Domingo, Digvijay Wadekar, Helen Shao, Faizan G. Mohammad, Sultan Hassan, Emily Moser, Erwin T. Lau, Luis Fernando Machado Poletti Valle, Andrina Nicola, Leander Thiele, Yongseok Jo, Oliver H.E. Philcox, Benjamin D. Oppenheimer, Megan Tillman, Chang Hoon Hahn, Neerav Kaushal, Et Al.
Michigan Tech Publications
The Cosmology and Astrophysics with Machine Learning Simulations (CAMELS) project was developed to combine cosmology with astrophysics through thousands of cosmological hydrodynamic simulations and machine learning. CAMELS contains 4233 cosmological simulations, 2049 N-body simulations, and 2184 state-of-the-art hydrodynamic simulations that sample a vast volume in parameter space. In this paper, we present the CAMELS public data release, describing the characteristics of the CAMELS simulations and a variety of data products generated from them, including halo, subhalo, galaxy, and void catalogs, power spectra, bispectra, Lyα spectra, probability distribution functions, halo radial profiles, and X-rays photon lists. We also release over 1000 …
Nanosecond Infrared Laser Ablation Dynamics, Achala Priyadarshani Deenamulla Kankanamalage
Nanosecond Infrared Laser Ablation Dynamics, Achala Priyadarshani Deenamulla Kankanamalage
LSU Doctoral Dissertations
Laser ablation dynamics encompasses studies of fundamental physical processes of mid infrared laser ablation. Understanding the mechanisms of IR laser desorption and ionization can lead to improvements in laser ablation-based techniques and expansion of their applications. Control of material removal ensures both accuracy and precision of the laser ablation-based techniques. The laser ablation mechanism in the studied wavelength region, is a process of water vaporization and photothermal disruption of tissue. Glycerol was used as the ablation target to establish the methods. Experiments were first aimed at developing methods to monitor material removal during ablation using a 2.94 µm wavelength mid-IR …
Wallaby Pre-Pilot Survey: Radio Continuum Properties Of The Eridanus Supergroup, J. A. Grundy, O. I. Wong, K. Lee-Waddell, N. Seymour, B. -Q. For, C. Murugeshan, B. S. Koribalski, Juan P. Madrid, J. Rhee, T. Westmeier
Wallaby Pre-Pilot Survey: Radio Continuum Properties Of The Eridanus Supergroup, J. A. Grundy, O. I. Wong, K. Lee-Waddell, N. Seymour, B. -Q. For, C. Murugeshan, B. S. Koribalski, Juan P. Madrid, J. Rhee, T. Westmeier
Physics and Astronomy Faculty Publications and Presentations
We present the highest resolution and sensitivity ∼ 1.4 GHz continuum observations of the Eridanus supergroup obtained as a part of the Widefield Australian Square Kilometer Array Pathfinder (ASKAP) L-band Legacy All-sky Blind surveY (WALLABY) pre-pilot observations using the ASKAP. We detect 9461 sources at 1.37 GHz down to a flux density limit of ∼ 0.1 mJy at 6.1′′×7.9′′ resolution with a median root mean square of 0.05 mJy beam −1 . We find that the flux scale is accurate to within 5 % (compared to NVSS at 1.4 GHz). We then determine the global properties of eight Eridanus supergroup …
Test Beam Performance Of A Cbc3-Based Mini-Module For The Phase-2 Cms Outer Tracker Before And After Neutron Irradiation, Cms Collaboration
Test Beam Performance Of A Cbc3-Based Mini-Module For The Phase-2 Cms Outer Tracker Before And After Neutron Irradiation, Cms Collaboration
Department of Physics and Astronomy: Faculty Publications
The Large Hadron Collider (LHC) at CERN will undergo major upgrades to increase the instantaneous luminosity up to 5–7.5 × 1034 cm-2s-1. This High Luminosity upgrade of the LHC (HL-LHC) will deliver a total of 3000–4000 fb-1 of proton-proton collisions at a center-of-mass energy of 13–14 TeV. To cope with these challenging environmental conditions, the strip tracker of the CMS experiment will be upgraded using modules with two closely-spaced silicon sensors to provide information to include tracking in the Level-1 trigger selection. This paper describes the performance, in a test beam experiment, of the …
Mesopause Region Temperature And Na Number Density Between 1990 And 2017, Tao Yuan, Chiao-Yao She
Mesopause Region Temperature And Na Number Density Between 1990 And 2017, Tao Yuan, Chiao-Yao She
Browse all Datasets
The Colorado State University (CSU) Na lidar performed nocturnal mesopause region Na density and temperature observations between March 1990 and March 2010 at Fort Collins, CO (41.6N, 105W). The lidar was relocated to Utah State University (USU) campus and has continued its regular observation at Logan, Utah (42N, 112W) since September 2010.