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首页> 外文期刊>Journal of Gravity >Gravitational Lagrangians, Mach’s Principle, and the Equivalence Principle in an Expanding Universe
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Gravitational Lagrangians, Mach’s Principle, and the Equivalence Principle in an Expanding Universe

机译:拉格朗日引力,马赫原理和扩展宇宙中的等价原理

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Gravitational Lagrangians as derived by Fock for the Einstein-Infeld-Hoffmann approach, and by Kennedy assuming only a fourth rank tensor interaction, contain long range interactions. Here we investigate how these affect the local dynamics when integrated over an expanding universe out to the Hubble radius. Taking the cosmic expansion velocity into account in a heuristic manner it is found that these long range interactions imply Mach’s principle, provided the universe has the critical density, and that mass is renormalized. Suitable higher order additions to the Lagrangians make the formalism consistent with the equivalence principle.
机译:Fock为爱因斯坦-英菲尔德-霍夫曼方法推导的引力拉格朗日派,以及肯尼迪假设仅第四阶张量相互作用,就包含了长程相互作用。在这里,我们研究了当将它们扩展到哈勃半径范围内的扩展宇宙时,这些因素如何影响局部动力学。以启发式的方式考虑宇宙膨胀速度,发现只要宇宙具有临界密度并且质量重新归一化,这些长距离相互作用就暗示了马赫原理。拉格朗日语中适当的高阶加法使形式主义与等价原理一致。

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