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Bach-Einstein Gravitational Field Equations as a Perturbation of Einstein Gravitational Field Equations
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作者 Fathy Ibrahim Abdel-Bassier Ahmed Fouad Abdel-Wahab Fayrouz Mostafa Abdel-Maboud 《Applied Mathematics》 2022年第12期1022-1032,共11页
The Bach equations are a version of higher-order gravitational field equations, exactly they are of fourth-order. In 4-dimensions the Bach-Einstein gravitational field equations are treated here as a perturbation of E... The Bach equations are a version of higher-order gravitational field equations, exactly they are of fourth-order. In 4-dimensions the Bach-Einstein gravitational field equations are treated here as a perturbation of Einstein’s gravity. An approximate inversion formula is derived which admits a comparison of the two field theories. An application to these theories is given where the gravitational Lagrangian is expressed linearly in terms of R, R<sup>2</sup>, |Ric|<sup>2</sup>, where the Ricci tensor Ric = R<sub>αβ</sub>dx<sup>α</sup>dx<sup>β</sup> is inserted in some formulas which are of geometrical or physical importance, such as;Raychaudhuri equation and Tolman’s formula. 展开更多
关键词 gravitational Theory Higher Order Gravity Buchdahl’s Formula Bach-Einstein gravitational field equations Raychaudhuri equation Tolman’s Formula
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How Classical, Quantum-Mechanical, and Relativistic Wave and Field Equations Are Uniformly Generated by Velocity-Field Divergence Equations
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作者 Frank Blume 《Journal of Applied Mathematics and Physics》 2023年第9期2739-2764,共26页
We expand previously established results concerning the uniform representability of classical and relativistic gravitational field equations by means of velocity-field divergence equations by demonstrating that conser... We expand previously established results concerning the uniform representability of classical and relativistic gravitational field equations by means of velocity-field divergence equations by demonstrating that conservation equations for (probability) density functions give rise to velocity-field divergence equations the solutions of which generate—by way of superposition—the totality of solutions of various well-known classical and quantum-mechanical wave equations. 展开更多
关键词 Uniform Representability gravitational field equations Velocity-field Divergence equations Conservation equations Wave equations
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On the Quantization of Time, Space and Gravity
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作者 Joseph Kongani Wamukoya 《Journal of Modern Physics》 2020年第11期1799-1806,共8页
We combine the de Broglie Matter Wave Equation with the Heisenberg Uncertainty Principle to derive an equation for time as a wave. This happens to be the first time that these two statements have been combined in this... We combine the de Broglie Matter Wave Equation with the Heisenberg Uncertainty Principle to derive an equation for time as a wave. This happens to be the first time that these two statements have been combined in this manner to derive an equation for time. The result is astounding. Time turns out to be a minuscule blob of quantum electromagnetic energy in perpetual angular momentum. From this time equation, we derive an equation for space which turns out to also predict a string (like the string of string theory). We then combine the time equation with the space equation to derive an equation for the inverse of quantum gravity which is also surprisingly electromagnetic in nature. This last statement implies that space is multidimensional and gravity in multidimensional space is not quantized, but its inverse (which is single-dimensional) is. 展开更多
关键词 Heisenberg Uncertainty Principle de Broglie Wave equation String Theory Motion in a gravitational field equation Linear Displacement Quantum Photon Energy
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