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arXiv 1407.8028gr-qc
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引力能动量张量问题的平凡解

The trivial solution of the gravitational energy-momentum tensor problem

H. Nikolic

摘要:

在文献中,人们经常发现这样的说法:对于引力场,不存在能量-动量张量,因此总的能量-动量守恒只能用引力能量-动量伪张量来定义。然而,通过放松引力能量-动量张量只依赖于度规的一阶导数的假设,爱因斯坦方程导致了一个微不足道的结果,即引力能量-动量张量本质上是爱因斯坦张量。我们讨论了这种能量动量定义的各种特点,并认为所有这些特点都有一个合理的物理解释。

英文摘要:

In the literature one often finds the claim that there is no such thing as an energy-momentum tensor for the gravitational field, and consequently, that the total energy-momentum conservation can only be defined in terms of a gravitational energy-momentum pseudo-tensor. Nevertheless, by relaxing the assumption that gravitational energy-momentum tensor should only depend on first derivatives of the metric, the Einstein equation leads to a trivial result that gravitational energy-momentum tensor is essentially the Einstein tensor. We discuss various peculiarities of such a definition of energy-momentum are argue that all these peculiarities have a sensible physical interpretation.

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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