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We provide new exact solutions to the Einstein-Maxwell system of equations which are physically reasonable. The spacetime is static and spherically symmetric with a charged matter distribution. We utilise an equation of state which is…

广义相对论与量子宇宙学 · 物理学 2015-06-12 S. D. Maharaj , P. Mafa Takisa

The difficulties with which the concept of point-like particles is beset, such as the infinities encountered in the existing theories of elementary particles, suggest a different approach to the study of these particles. Instead of…

综合物理 · 物理学 2011-07-25 Seyyed Mahmoud Hessaby

We modify the Einstein-Schrodinger theory to include a cosmological constant $\Lambda_z$ which multiplies the symmetric metric, and we show how the theory can be easily coupled to additional fields. The cosmological constant $\Lambda_z$ is…

广义相对论与量子宇宙学 · 物理学 2008-11-26 J. A. Shifflett

Cosmological perturbation theory is a powerful tool to predict the statistics of large-scale structure in the weakly non-linear regime, but even at 1-loop order it results in computationally expensive mode-coupling integrals. Here we…

宇宙学与河外天体物理 · 物理学 2017-02-17 Xiao Fang , Jonathan A. Blazek , Joseph E. McEwen , Christopher M. Hirata

An energy-momentum tensor for general relativistic spinning fluids compatible with Tulczyjew-type supplementary condition is derived from the variation of a general Lagrangian with unspecified explicit form. This tensor is the sum of a term…

广义相对论与量子宇宙学 · 物理学 2014-11-21 Morteza Mohseni

We show that Geroch decomposition leads us to Maxwell-like representation of gravity in $(3+1)$ metrics decomposition that may be perceived as Lorentz invariant version of GEM. For such decomposition we derive four-potential $V^\mu$ and…

综合物理 · 物理学 2015-01-13 Piotr Ogonowski , Piotr Skindzier

Coupling the Maxwell tensor to the Riemann-Christoffel curvature tensor is shown to lead to a geometricized theory of electrodynamics. While this geometricized theory leads directly to the classical Maxwell equations, it also extends their…

综合物理 · 物理学 2024-01-11 Raymond J. Beach

Applied magnetic fields can couple to atomic displacements via generalized Lorentz forces, which are commonly expressed as gyromagnetic $g$ factors. We develop an efficient first-principles methodology based on density-functional…

材料科学 · 物理学 2022-03-23 Asier Zabalo , Cyrus E. Dreyer , Massimiliano Stengel

A new approach to Quantum Gravity is proposed that is manifestly compatible with Cellular Automata (CA) theory, and is based on a new quantum theory of inertia where Newtonian Inertia results from the electromagnetic forces between the…

综合物理 · 物理学 2007-05-23 Tom Ostoma , Mike Trushyk

The equivalence principle and its universality enables the geometrical formulation of gravity. In the standard formulation of General Relativity \'a la Einstein, the gravitational interaction is geometrized in terms of the spacetime…

广义相对论与量子宇宙学 · 物理学 2022-11-23 Lavinia Heisenberg , Simon Kuhn , Laurens Walleghem

Starting from the experimental fact that a moving charge experiences the Lorentz force and applying the fundamental principles of simplicity (first order derivatives only) and linearity (superposition principle), we show that the structure…

经典物理 · 物理学 2016-05-27 Gerhard Diener , Jürgen Weissbarth , Frank Grossmann , Rüdiger Schmidt

The formula for the electric field of a point charge moving with constant velocity is derived using the symmetry properties of Maxwell's equations - its Lorentz invariance. In contrast to conventional treatments, the derivation presented…

物理教育 · 物理学 2015-06-26 Valery P. Dmitriyev

We present a general method to determine the entropy current of relativistic matter at local thermodynamic equilibrium in quantum statistical mechanics. Provided that the local equilibrium operator is bounded from below and its lowest lying…

高能物理 - 理论 · 物理学 2019-07-22 F. Becattini , D. Rindori

A four-dimensional differential Euler-Lagrange equation for continuously distributed materials is derived based on the principle of least action, and instead of Lagrangian, this equation contains the Lagrangian density. This makes it…

综合物理 · 物理学 2024-05-02 Sergey G. Fedosin

This paper is a review of the canonical proper-time approach to relativistic mechanics and classical electrodynamics. The purpose is to provide a physically complete classical background for a new approach to relativistic quantum theory.…

数学物理 · 物理学 2010-09-17 Tepper L. Gill , Woodford W. Zachary

Maxwell's equations can be obtained in generalized coordinates by considering the electromagnetic field as an external agent. The work here presented shows how to obtain the electrodynamics for a charged particle in generalized coordinates…

广义相对论与量子宇宙学 · 物理学 2015-06-25 Ana Laura Garcia-Perciante , Alfredo Sandoval-Villalbazo , L. S. Garcia-Colin

Theories based on General Relativity or Quantum Mechanics have taken a leading position in macroscopic and microscopic Physics, but fail when used in the other extremity. Thus, we try to establish a new structure of united theory based on…

综合物理 · 物理学 2014-04-14 Chang-kai Zhang

Electromagnetic waves are an inherent part of all plasmas -- laboratory fusion plasmas or astrophysical plasmas. The conventional methods for studying properties of electromagnetic waves rely on discretization of Maxwell equations suitable…

等离子体物理 · 物理学 2023-12-15 Efstratios Koukoutsis , Kyriakos Hizanidis , George Vahala , Min Soe , Linda Vahala , Abhay K. Ram

A novel electromagnetic particle-in-cell algorithm has been developed for fully kinetic plasma simulations on unstructured (irregular) meshes in complex body-of-revolution geometries. The algorithm, implemented in the BORPIC++ code,…

数值分析 · 数学 2024-05-16 Dong-Yeop Na , Fernando L. Teixeira , Yuri A. Omelchenko

This paper presents an intuitive, geometrical derivation of the relativistic addition of velocities, and of the electromagnetic interaction between two uniformly moving charged particles, based on 2 spatial + 1 temporal dimensional…

经典物理 · 物理学 2025-04-29 Calin Galeriu