# Physics Commons™

30,884 Full-Text Articles 45,825 Authors 5,714,572 Downloads 262 Institutions

## All Articles in Physics

30,884 full-text articles. Page 5 of 841.

Physics 223 Poster: Statistical Mechanics And Dice, 2020 Longwood University

#### Physics 223 Poster: Statistical Mechanics And Dice, Ibrahim Maday

##### Student Showcase for Research and Creative Inquiry

No abstract provided.

Physics 223 Poster: Hubble Law, 2020 Longwood University

#### Physics 223 Poster: Hubble Law, Nick Zebhideh

##### Student Showcase for Research and Creative Inquiry

No abstract provided.

Physics 223 Poster: Hubble Law, 2020 Longwood University

#### Physics 223 Poster: Hubble Law, James Cox

##### Student Showcase for Research and Creative Inquiry

No abstract provided.

Physics 223: Statistical Mechanics And Dice, 2020 Longwood University

#### Physics 223: Statistical Mechanics And Dice, Connor Rosenberry

##### Student Showcase for Research and Creative Inquiry

No abstract provided.

Physics 223 Poster: Hubble Law, 2020 Longwood University

#### Physics 223 Poster: Hubble Law, Rebecca Alvarez

##### Student Showcase for Research and Creative Inquiry

No abstract provided.

2020 Utah State University

#### Understanding Noether’S Theorem By Visualizing The Lagrangian, Seth Moser

##### Physics Capstone Projects

By approaching Lagrangian mechanics from a graphical perspective the implications of Noether’s Theorem can be made easier to understand. Plotting the Lagrangian for classical single particle systems for one coordinate onto a position-velocity phase space along with the corresponding equations of motion can demonstrate how a system is invariant under continuous transforms in that coordinate. This invariance can be shown to be associated with a quantity in the system that’s conserved via Noether’s Theorem. The relationship between the symmetry of the system and conserved quantities can then be extended to fields. Invariance in this case is extended ...

Quantum Computing And Quantum Algorithms, 2020 Liberty University

#### Quantum Computing And Quantum Algorithms, Daniel Serban

##### Senior Honors Theses

The field of quantum computing and quantum algorithms is studied from the ground up. Qubits and their quantum-mechanical properties are discussed, followed by how they are transformed by quantum gates. From there, quantum algorithms are explored as well as the use of high-level quantum programming languages to implement them. One quantum algorithm is selected to be implemented in the Qiskit quantum programming language. The validity and success of the resulting computation is proven with matrix multiplication of the qubits and quantum gates involved.

2020 Portland State University

#### Analytical Results For The Three-Body Radiative Attachment Rate Coefficient, With Application To The Positive Antihydrogen Ion H¯+, Jack C. Straton

##### Physics Faculty Publications and Presentations

To overcome the numerical difficulties inherent in the Maxwell–Boltzmann integral of the velocity-weighted cross section that gives the radiative attachment rate coefficient αRA for producing the negative hydrogen ion H or its antimatter equivalent, the positive antihydrogen ion H¯+ , we found the analytic form for this integral. This procedure is useful for temperatures below 700 K, the region for which the production of H¯+ has potential use as an intermediate stage in the cooling of antihydrogen to ultra-cold (sub-mK) temperatures for spectroscopic studies and probing the gravitational interaction of the anti-atom. Our results, utilizing a 50-term explicitly correlated exponential ...

The Perceived Effect Of Transformer Core Metal On Musical Sounds, 2020 Belmont University

#### The Perceived Effect Of Transformer Core Metal On Musical Sounds, Addie Lopshire-Bratt

##### Honors Theses

Transformers are an electronic component used to change the voltage from one part of a circuit to the next. They appear in most audio equipment from the earlier eras but left a sonic signature on the sound waves passed through them. Most research conducted on the “sound” of transformers has focused on their effect on simple sine waves passed through the component, not complex–musical–waves. This thesis seeks to organize the research available about transformers and simple sine waves and compare it with the gamut of opinions that audio professionals hold about their sound.

2020 Utah State University

#### Determing The Chaotic Nature Of Periodic Orbits, Bo Johnson

##### Physics Capstone Projects

The determination of the long-term behavior of periodic orbits is considered. Different numerical techniques, including the Lyapunov Exponent, the Smaller Alignment Index, and the Generalized Alignment Index are used. Because of the discontinuous nature of the system under consideration, these methods are found to be insufficient and a more simplistic approach is utilized. The simplistic approach determines long-term behavior up to 500 periods of an orbit. It is found that in-phase periodic modes result in the largest amount of stable modes. Future work will look at the common characteristics of the in-phase modes to better understand why they are more ...

2020 Hope College

#### Aqueous And Non-Aqueous Characterization Of The Charge Storage Of Prussian Blue Analogues With Varying Modification Procedures, Kamaron Wilcox

##### 19th Annual Celebration of Undergraduate Research and Creative Activity (2020)

Prussian Blue Analogues (PBAs) provide a promising look into the future of battery technology; their low cost and facile creation grants the opportunity for a commercially viable battery. In addition, their components consist of earth-abundant elements, which may potentially lead to a green battery material, an area of growing importance. The modification process in which the PBA forms may be carried out by one of two techniques: the standard cyclic voltammetry (CV) technique consists of performing cyclic voltammetry in a modification solution for a set number of cycles, whereas the dipping technique involves submerging the substrate in the solution for ...

Ultrafast Control Of Excitonic Rashba Fine Structure By Phonon Coherence In The Metal Halide Perovskite Ch3nh3pbi3, 2020 Iowa State University and Ames Laboratory

#### Ultrafast Control Of Excitonic Rashba Fine Structure By Phonon Coherence In The Metal Halide Perovskite Ch3nh3pbi3, Zhaoyu Liu, Chirag Vaswani, X. Yang, X. Zhao, Yongxin Yao, Z. Song, Di Cheng, Y. Shi, Liang Luo, Dinusha Herath Mudiyanselage, Chuankun Huang, Joong-Mok Park, Richard H. J. Kim, J. Zhao, Y. Yan, Kai-Ming Ho, Jigang Wang

##### Ames Laboratory Accepted Manuscripts

We discover hidden Rashba fine structure in CH3NH3PbI3 and demonstrate its quantum control by vibrational coherence through symmetry-selective vibronic (electron-phonon) coupling. Above a critical threshold of a single-cycle terahertz pump field, a Raman phonon mode distinctly modulates the middle excitonic states with persistent coherence for more than ten times longer than the ones on two sides that predominately couple to infrared phonons. These vibronic quantum beats, together with first-principles modeling of phonon periodically modulated Rashba parameters, identify a threefold excitonic fine structure splitting, i.e., optically forbidden, degenerate dark states in between two bright ones with a narrow, similar to ...

2020 Belmont University

#### An Analysis Of The Debate Over Creation, Evolution, And The Timeline Of The Universe At An Ecumenical Christian University, Mason Pohlman

##### Honors Theses

Throughout a significant portion of history and within modern culture, the fields of science and religion appear to be competing for the same holds in a person’s belief system. Universities are where academics and the sciences are the prevailing held truth, while in churches, the Bible reigns as supreme authority. However, in a Christian academic setting, the predominate school of thought in belief systems might turn into a little more of a melting pot. By analyzing gathered personal data (via surveys and interviews), one can begin to piece together the predominate thoughts on the apparent conflict between religion and ...

Charged Particle Identification Using Calorimetry And Tracking At The Belle Ii Experiment, 2020 University of Louisville

#### Charged Particle Identification Using Calorimetry And Tracking At The Belle Ii Experiment, Joseph T. Nunziata, Atanu Pathak, Swagato Banerjee

##### Undergraduate Arts and Research Showcase

Particle identification (PID) is a critical procedure carried out in high energy physics experiments in search of new physics. When particles of matter (i.e., an electron) and antimatter (i.e., a positron) collide, new types of particles may form given certain conditions. Such particles may be classified as hadrons--which feel the strong nuclear force--and leptons--which do not. Identifying particles at the Belle II experiment is done by combining the measurement of energy deposited in the calorimeter with the measurement of track momentum in the tracker. In a tau lepton ($\tau$) decay sample, particles such as electrons, muons, and pions ...

Spin Dynamics In Antiferromagnetic Oxypnictides And Fluoropnictides: Lamnaso, Lamnsbo, And Bamnasf, 2020 Ames Laboratory

#### Spin Dynamics In Antiferromagnetic Oxypnictides And Fluoropnictides: Lamnaso, Lamnsbo, And Bamnasf, Farhan Islam, Elijah Gordon, Pinaki Das, Yong Liu, Liquin Ke, Douglas L. Abernathy, Robert L. Mcqueeney, David Vaknin

##### Ames Laboratory Accepted Manuscripts

Inelastic neutron scattering (INS) from polycrystalline antiferromagnetic LaMnAsO, LaMnSbO, and BaMnAsF are analyzed using a J(1)-J(2)-J(c) Heisenberg model in the framework of the linear spin-wave theory. All three systems show clear evidence that the nearest- and next-nearest-neighbor interactions within the Mn square lattice layer (J(1) and J(2)) are both antiferromagnetic (AFM). However, for all compounds studied the competing interactions have a ratio of 2J(2)/J(1) < 1, which favors the square lattice checkerboard AFM structure over the stripe AFM structure. The interplane coupling Jc in all three systems is on the order of similar to 3 x 10(-4)J(1), rendering the magnetic properties of these systems with quasi-two-dimensional character. The substitution of Sb for As significantly lowers the in-plane exchange coupling, which is also reflected in the decrease of the Neel temperature, T-N. Although BaMnAsF shares the same MnAs sheets as LaMnAsO, their J(1) and J(2) values are substantially different. Using density functional theory, we calculate exchange parameters J(ij) to rationalize the differences among these systems.

Magnetic Forces In The Absence Of A Classical Magnetic Field, 2020 Chapman University

#### Magnetic Forces In The Absence Of A Classical Magnetic Field, Ismael L. Paiva, Yakir Aharonov, Jeff Tollaksen, Mordecai Waegell

##### Mathematics, Physics, and Computer Science Faculty Articles and Research

It is shown that, in some cases, the effect of discrete distributions of flux lines in quantum mechanics can be associated with the effect of continuous distributions of magnetic fields with special symmetries. In particular, flux lines with an arbitrary value of magnetic flux can be used to create energetic barriers, which can be used to confine quantum systems in specially designed configurations. This generalizes a previous work where such energy barriers arose from flux lines with half-integer fluxons. Furthermore, it is shown how the Landau levels can be obtained from a two-dimensional grid of flux lines. These results suggest ...

Single-Atom-Layer Traps In A Solid Electrolyte For Lithium Batteries, 2020 University of Science and Technology of China

#### Single-Atom-Layer Traps In A Solid Electrolyte For Lithium Batteries, Feng Zhu, Md Shafiqul Islam, Lin Zhou, Zhenqi Gu, Ting Liu, Xinchao Wang, Jun Luo, Ce-Wen Nan, Yifei Mo, Cheng Ma

##### Ames Laboratory Accepted Manuscripts

In order to fully understand the lithium-ion transport mechanism in solid electrolytes for batteries, not only the periodic lattice but also the non-periodic features that disrupt the ideal periodicity must be comprehensively studied. At present only a limited number of non-periodic features such as point defects and grain boundaries are considered in mechanistic studies. Here, we discover an additional type of non-periodic feature that significantly influences ionic transport; this feature is termed a “single-atom-layer trap” (SALT). In a prototype solid electrolyte Li0.33La0.56TiO3, the single-atom-layer defects that form closed loops, i.e., SALTs, are found ubiquitous by atomic-resolution electron ...

2020 Louisiana State University and Agricultural and Mechanical College

#### The Siltcatcher: A Sediment-Capture System For Wetland Creation And Coastal Protection In Western Lake Pontchartrain, Andrew M. Wright

##### LSU Master's Theses

The West Lake Pontchartrain region faces a number of long-term environmental challenges due to anthropogenic climate disturbance and landscape modification, including sea level rise, increased storm surge risk, shoreline erosion, and wetland degradation. In response, this thesis applies recent research in the fields of landscape architecture and civil engineering to propose a dynamic, natural-systems solution for wetland creation and shoreline protection. The project envisions a series of breakwater-like structures in western Lake Pontchartrain positioned to slow water released from the nearby Bonnet Carré Spillway, causing suspended sediment to settle and create self-building and self-sustaining wetlands capable of keeping pace with ...

An Experiential Report On The Thayer Method Of Teaching Across College-Level Chemistry, Biology, Math, And Physics Courses, 2020 Georgia Gwinnett College

#### An Experiential Report On The Thayer Method Of Teaching Across College-Level Chemistry, Biology, Math, And Physics Courses, Kevin P. O'Halloran, Sairam Tangirala, Fengjie Sun, Leonard E. Anagho, Gerald Agbegha, Clay Runck, David Roth, Amy H. Erickson

##### Georgia Journal of Science

The Thayer method of instruction is a little-known active learning technique that dates back to 1817 at the U.S. Military Academy. This study describes the implementation and statistical evaluation of an adaptation of the Thayer method in a variety of college science and math courses. All courses had five characteristics in common: (i) students were given a daily reading schedule and instructed to prepare before class, (ii) each class started with a question and answer session, (iii) class time minimized the use of lecture, (iv) class time maximized the use of active learning, and (v) students were frequently quizzed ...

Photocatalytic Performance Of V2O5 Nanoparticles Incorporated Tio2 Nanotubes As A Visible-Light Active Photoelectrodefor Water Splitting, 2020 National University of Uzbekistan

#### Photocatalytic Performance Of V2O5 Nanoparticles Incorporated Tio2 Nanotubes As A Visible-Light Active Photoelectrodefor Water Splitting, Ulugbek Shaislamov, Kamil Mukimov, Turgunali Akhmadjanov

##### Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences

Herein we demonstrate brief investigation results of photoelectrochemical performance of TiO2 nanotube (NT) based photoelectrode incorporated with V2O5 nanopaerticles (NP). Photoelectrodes were composed of TiO2 NTs with a diameter of 100 nm and length of 8µm,that were prepared by electrochemical anodization process at 35V in a formamade based electrolyte. The V2O5 nanoparticles were formed on the walls of the TiO2 NTs by deep coating technique with an average size of ∼5-10 nm. The V2O5NP incorporated TiO2NTs show superior light absorption properties in the ...