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arXiv 0905.0209gr-qc
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遥平行拉格朗日几何与统一的场论

Teleparallel Lagrange Geometry and a Unified Field Theory

M. I. Wanas, Nabil L. Youssef, A. M. Sid-Ahmed

摘要:

本文在扩展绝对场论(EAP-)几何的背景下,构造了一个统一引力和电磁的场论。这种几何在其结构中结合了切丛的几何丰富性和绝对平行论(AP-)几何的数学简单性。所构造的场论是Mikhail和Wanas提出的广义场论(GFT)的推广。所得到的理论是纯几何的。水平(Resp。垂直)场方程推导出通过应用欧拉-拉格朗日方程到一个适当的水平(分别)。垂直)标量拉格朗日。结果水平的对称部分(分别为垂直)场方程产生了爱因斯坦场方程的广义形式,其中水平(分别为能量-动量张量是纯几何的。所产生的水平线的斜对称部分(分别为垂直)场方程产生了麦克斯韦方程组的广义形式,其中电磁场是纯几何的。一些有趣的特殊情况下,这揭示了所获得的场方程的非线性连接的作用,检查。最后,我们构造的场方程减少到GFT的条件下,明确建立。

英文摘要:

In this paper, we construct a field theory unifying gravity and electromagnetism in the context of Extended Absolute Parallelism (EAP-) geometry. This geometry combines, within its structure, the geometric richness of the tangent bundle and the mathematical simplicity of Absolute Parallelism (AP-) geometry. The constructed field theory is a generalization of the Generalized Field Theory (GFT) formulated by Mikhail and Wanas. The theory obtained is purely geometric. The horizontal (resp. vertical) field equations are derived by applying the Euler-Lagrange equations to an appropriate horizontal (resp. vertical) scalar Lagrangian. The symmetric part of the resulting horizontal (resp. vertical) field equations gives rise to a generalized form of Einstein's field equations in which the horizontal (resp. vertical) energy-momentum tensor is purely geometric. The skew-symmetric part of the resulting horizontal (resp. vertical) field equations gives rise to a generalized form of Maxwell equations in which the electromagnetic field is purely geometric. Some interesting special cases, which reveal the role of the nonlinear connection in the obtained field equations, are examined. Finally, the condition under which our constructed field equations reduce to the GFT is explicitly established.

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