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arXiv 1207.0465gr-qchep-thmath-phmath.MP
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引力电磁类比

Gravito-electromagnetic analogies

L. Filipe O. Costa, José Natário

摘要:

我们重新审视和进一步发展不同的重力电磁(GEM)的类比发现在文献中,并澄清它们之间的联系。特别强调的是放在两个确切的物理类比:类比的基础上惯性场从所谓的“1+3形式主义”,和类比的基础上潮汐张量。两者都是重新制定,扩大和推广。我们用两种形式写出麦克斯韦和完全精确的有源爱因斯坦场方程,加上代数比安奇恒等式,它们被转换成引力场的无源方程。每种方法的新结果都被公布。作为精确的类比的一个极限情况,得到了洛仑兹坐标系中线性化引力和电磁之间的著名类比。麦克斯韦张量和外尔张量之间的形式类比也进行了讨论,并与其他方法的见解一起,用于物理解释引力辐射。精确的条件下,重力和电磁之间的相似性发生了讨论,我们总结了每种方法的主要成果。

英文摘要:

We reexamine and further develop different gravito-electromagnetic (GEM) analogies found in the literature, and clarify the connection between them. Special emphasis is placed in two exact physical analogies: the analogy based on inertial fields from the so-called "1+3 formalism", and the analogy based on tidal tensors. Both are reformulated, extended and generalized. We write in both formalisms the Maxwell and the full exact Einstein field equations with sources, plus the algebraic Bianchi identities, which are cast as the source-free equations for the gravitational field. New results within each approach are unveiled. The well known analogy between linearized gravity and electromagnetism in Lorentz frames is obtained as a limiting case of the exact ones. The formal analogies between the Maxwell and Weyl tensors are also discussed, and, together with insight from the other approaches, used to physically interpret gravitational radiation. The precise conditions under which a similarity between gravity and electromagnetism occurs are discussed, and we conclude by summarizing the main outcome of each approach.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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