Open Access Journal of Physics最新文献_第4页

Angle-Resolved Photoelectron Spectroscopy Studied Based on Plane Density of States. Application to Beryllium 基于平面态密度的角分辨光电子能谱研究。铍的应用

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0303005

Nguyen Van Hung, Nguyen Cong Toan

引用次数: 0

Double Transient Chaotic Behaviour of a Rolling Ball 滚动球的双瞬态混沌行为

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0202003

P. Nagy, P. Tasnádi

{"title":"Double Transient Chaotic Behaviour of a Rolling Ball","authors":"P. Nagy, P. Tasnádi","doi":"10.22259/2637-5826.0202003","DOIUrl":"https://doi.org/10.22259/2637-5826.0202003","url":null,"abstract":"The attractor of a dynamical system is a subset of the state space to which orbits originating from typical initial conditions tend as time increases. An attractor is called chaotic or strange if it has a fractal structure in the phase space. While in case of permanent chaos the phase points of the system do never leave the chaotic attractor, if the chaos is transient the trajectory is staying only a finite time at the chaotic attractor and after it runs asymptotically into a simple attractor. If two or more attractors coexist, trajectories may hesitate for a long time before getting captured by one of the attractors. The basin of attraction of an attractor is the set of initial conditions which produces trajectory approaching the attractor. Fractal basin boundaries are common properties of dynamical systems [1]. Trajectories starting from a fractal boundary show often a transient chaos. In dissipative systems without any driving all motion must eventually cease because of the continuous decay of the energy. In this case, sequential magnifications of the phase space indicate that the set of long lifetimes becomes increasingly sparse at sufficiently small scales, so we can find that the fractality of the basin boundary is scale-dependent (the fractaldimension of the basin boundaries is found to decrease with magnification and tend to unit). This behaviour has been termed the doubly transient chaos. It is an interesting fact that the character of chaos changes when driving is added. For example in the case of external excitation unstable periodic orbits immediately appear, and the long term dynamics tend to permanent chaos [2].","PeriodicalId":333499,"journal":{"name":"Open Access Journal of Physics","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128239088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

A Brief Pedestrian Derivation of E = mc² for the Amateur Enthusiasts E = mc²对业余爱好者的简单推导

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0402003

Zion Elani

引用次数: 0

A Non-radiating Atomic Electron Model with an Application to Molecular Structure and the Periodic Table 应用于分子结构和元素周期表的非辐射原子电子模型

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0501001

Donald c. Aucamp

引用次数: 0

A New Gate to NUMEROV'S Method NUMEROV方法的一个新入口

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0203001

A. Yasser, T. A. Nahool

引用次数: 1

Fermions Confinement to a 4-Dimensional Universe is the Source for Dark Matter 费米子限制在四维宇宙中是暗物质的来源

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0303001

D. Kwiat

引用次数: 0

On The Biased Calculation of the Inflationary Universe 论暴胀宇宙的偏差计算

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0301002

Sc.D Donald Aucamp

引用次数: 0

Shift Phase as a Result of Formal Interaction 作为正式相互作用结果的转移阶段

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0401004

Roshdestvensky A. E, I. A. Lipatov, Roshdestvensky S. A

引用次数: 0

Polarization of Vacuum 真空极化

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0203003

S. Konstantinov

{"title":"Polarization of Vacuum","authors":"S. Konstantinov","doi":"10.22259/2637-5826.0203003","DOIUrl":"https://doi.org/10.22259/2637-5826.0203003","url":null,"abstract":"In classical electrodynamics, vacuum is a \"medium\" with absolute dielectric and magnetic permeability (εa, μa), which are equal to the dielectric and magnetic constant (εo, μo). The electric strength of the vacuum is infinite, that is, theoretically the electric field of any intensity cannot cause conduction currents in a vacuum due to the lack of charge carriers. In other words, the electric field strength E, the magnetic field strength H, as well as the density of electromagnetic energy in vacuum defined by them, can be infinitely large. It should be noted that these conclusions are obtained from the standpoint of the classical electrodynamics of Maxwell's linear field and, in the light of the latest achievements of quantum electrodynamics (QED), are incorrect. In QED, the instability of a physical vacuum under the influence of cosmic radiation, relativistic protons and electrons, peak electric fields, or high-intensity laser radiation is characterized by the avalanche formation of electron-positron pairs in a vacuum [1,2,3]. Nils Bohr was right when he stated 80 years ago that \"it is impossible to attain a tension of the order of Es for the field that generates electron-positron pairs.\" ( Es= m2/e = 1,32·1016 V∙cmˉ1 the characteristic quantumelectrodynamics Sauter’s field) [3]. It should be noted that any quantum process of pair production from vacuum is accompanied by various many partial processes. In QED there is still no complete clarity on how to solve the problem of the production of pairs of elementary particles and antiparticles in a vacuum under the action of external fields, relying on the corresponding the Klein-Gordon-Fock and Diract equations.","PeriodicalId":333499,"journal":{"name":"Open Access Journal of Physics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126336033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

An Alternative to the General Theory of Relativity 广义相对论的另一种选择

Open Access Journal of Physics Pub Date : 1900-01-01 DOI: 10.22259/2637-5826.0401003

Donald c. Aucamp

引用次数: 0