Einstein S Field Equations
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Geração de soluções exatas em Relatividade Geral através do Método de Kerr-Schild
Resumo Neste trabalho, apresentamos o método de Kerr-Schild para obter novas soluções das equações de campo de Einstein a partir de uma solução de fundo conhecida. São mostradas algumas das propriedades e uma introdução histórica do método, além da apresentação de alguns exemplos de sua aplicação.Abstract In this work we introduce Kerr-Schil
Rev. Bras. Ensino Fís.. Publicado em: 13/06/2019
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2. Energy in an expanding universe in the teleparallel geometry
The main purpose of this paper is to explicitly verify the consistency of the energy-momentum and angular momentum tensor of the gravitational field established in the Hamiltonian structure of the Teleparallel Equivalent of General Relativity (TEGR). In order to reach these objectives, we obtained the total energy and angular momentum (matter plus gravitatio
Brazilian Journal of Physics. Publicado em: 2010-03
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3. Gas de Bose diluido fracamente confinado / Dilute Bose gas weakly confined
A critical study of atomic Bose-Einstein condensates (BECs) is presented. Taking as a starting point the physics of the free gas, we study the effect of weakly confining potentials. Two cases were studied in detail: i) an atomic gas in a finite square well potential with a few bound states; and ii) a system confined in two-dimensions by an isotropic harmonic
Publicado em: 2010
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4. Tratamento das equações de Eintein-Yang-Mills para soluções numericas com simetria esferica auto-gravitante e simetria axial no espaço-tempo de Minkowski / Set up of Einstein-Yang-Mills equation for numerical solutions of self-gravitating spherical symmetric fields and axial simmetric fields on Minkowski space-time
Nesse trabalho delineamos a teoria clássica para o campo de Einstein-Yang-Mills e elaboramos um conjunto particular de equações para obtermos soluções numéricas. Estudamos dois casos com simetria espaço-temporal: Simetria esférica com campo auto-gravitante e simetria axial no espaço-tempo de Minkowski. Utilizamos métodos numéricos das linhas para
Publicado em: 2007
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5. Estabilidade de curvas tipo-tempo fechadas em variedades lorentzianas / Stability of closed timelike curves in Lorentzian manifolds
Several solutions of Einstein?s field equations admit closed timelike curves (CTCs). We study the linear stability of this kind of curve. We analyze the CTCs in Gödel universe and we find that these curves are stable. The same occurs with the CTCs of a particular case of Gödel-type metric with flat background and with CTCs of a model that contains a single
Publicado em: 2007
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6. ON EINSTEIN'S UNIFIED FIELD EQUATIONS AND THE SCHWARZCHILD SOLUTION
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7. Explanation of parity nonconservation
Space inversion and other discrete symmetries are treated within the frame of a theory of fundamental forces based only on general considerations of causality, symmetry, and stability, without ad hoc differential equations. The basic space-time ˜M is the Einstein universe R1 × S3 as a causal (or conformal) rather than a pseudo-Riemannian manifold. Its conn