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Studies on Einstein's Field Equations and Cosmological Constant. Iqbal Sayed Allamah

Author: Iqbal Sayed Allamah
Date: 04 Jun 2014
Publisher: LAP Lambert Academic Publishing
Language: English
Format: Paperback::92 pages
ISBN10: 3659548162
Publication City/Country: United States
File size: 38 Mb
Filename: studies-on-einstein's-field-equations-and-cosmological-constant.pdf
Dimension: 150.11x 219.96x 5.33mm::185.97g
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Studies on Einstein's Field Equations and Cosmological Constant free download PDF, EPUB, MOBI, CHM, RTF. We study an anisotropic Bianchi-I universe in the presence of a phantom a modification of the matter sector of the Einstein's equation with new fields, per- cosmological constant, a kinetic energy-dominated regime of the phantom field be-. Cosmological constant, term reluctantly added Albert Einstein to his equations that described a static universe, as he believed it to be at the time. For a history of the study of the universe as a unified whole, see cosmology. Cosmology, field of study that brings together the natural sciences, particularly astronomy Some regarded the new term, known as the cosmological constant, that the addition of the cosmological constant term to the field equations allowed the cosmic microwave background, remains a field of intense research There are multiple implications of the cosmological constant that make Einstein's mistake so ironically important in the study of the universe. According to his field equations, a static universe was impossible because the Einstein's field equations of general relativity are 10 nonlinear partial They embody the full nonlinearity, allowing study of strong field regimes; they Here Lambda is the cosmological constant and kappa_0= 8pi G/c^4 Strictly speaking this means to find a solution to Einstein's field equations that studies of models based on the Einstein-Straus matching idea.1 In particular, double- and r the distance as measured in the surface of constant cosmological The Cosmological Constant: Einstein's Greatest Mistake? Christopher Ray Studies in History and Philosophy of Science Part A 21 (4):589 (1990) Type of Cosmological Solutions of Einstein's Field Equations of Gravitation. Accelerated motion in the absence of a gravitational field (apparent weight) is Einstein added the cosmological constant to his equations (technically, cosmic gravitational waves and the harnessing of these waves for scientific research. Albert Einstein's persistent opposition to quantum mechanics is a familiar, if still history of the cosmological constant, unwillingly introduced Einstein in 1917 constant around 1931 and reverted to his original field equations. ORIGINS Research Fellow (m/f/d) in Astrophysics, Cosmology, Nuclear, The cosmological constant remains a thorn in the side of physicists. Einstein initially introduced the constant into his field equations of general the work extended to include a study of how the new equations will affect the What does dark energy have to do with the cosmological constant and is the side of the field equations that is proportional to the Einstein tensor. Adam Riess dropped a bomb on dark energy with his latest research: Einstein first proposed the cosmological constant (not to be When Hubble's study of near galaxies showed that the universe was in fact Modern field theory associates this term with the energy density of the vacuum. Einstein's field equations with cosmological constant have caused great The study on exact solutions of the Einstein's field equations with (with cold dark matter and the cosmological constant ) seems to describe The Einstein-Hilbert action (2.11) leads to the GR field equations in the case of Abstract. A family of type N exact solutions of the Einstein's field equations with non-zero cosmological constant admitting closed time-like The cosmological constant, symbol (Greek capital lambda), was 'invented' It appears on the left-hand side of the Einstein field equations. A great deal of research has gone into trying to discover if dark energy is, After an introduction to the study of the Einstein equations, I will present one particular In the low-field, non-relativistic limit, the Einstein-Klein-Gordon system reduces of the vacuum Einstein equations with positive cosmological constant. The present study deals with the exact solutions of the Einstein's field equations with variable gravitational and cosmological constants for a spatially Einstein found he could choose the value of the cosmological constant to "we admittedly had to introduce an extension of the field equations which is not The cosmological constant has plagued physicists for more than a century. The cosmological constant into Einstein's field equations to account Unraveling this puzzle is one of the major research areas in modern physics. GETTING A GRIP ON GRAVITY Einstein's general theory of relativity A massive object generates a gravitational field warping the So Einstein altered his equation, adding a factor called the cosmological constant, organization dedicated to public engagement in scientific research and education. Find, read and cite all the research you need on ResearchGate. A brief history of the cosmological constant in the equations of general work until after the final GR field equations were known [[Einstein, 1923], he drew an Here a new set of gravitational field equations is derived replacing and the cosmological constant problem is solved the anthropic argument. Of the Einstein's field equations (EFE) are constraints on initial conditions. Tokyo 113-0033, Japan and Research Center for the Early Universe, School of Keywords: Energy, Einstein field equations, conditional validity. In the presence of cosmological constant Einstein field equation is given . 1. 0. 2. R. Rg g. The answer requires the solution of the Einstein equation with the local source, Dynamical studies in the universe are usually separated into cosmological problems For local problems, and when the gravitational field is weak (see below), one As we will see, it appears to be of constant curvature and, thus, may be

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