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arXiv 2104.11297gr-qc
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具有连续线性各向同性的时空I:空间旋转

Spacetimes with continuous linear isotropies I: spatial rotations

M. A. H. MacCallum

摘要:

彼得罗夫D型时空中局域旋转对称性(LRS)的最弱判据是古德和温赖特(Goode and Wainwright,1986)提出的。在这里,它示出,使用有关的方法的Cartan-Karlhede程序,相当于局部空间旋转不变性的黎曼张量及其一阶导数。共形平坦的时空进行了类似的研究,它表明,几乎所有的情况下,相同的标准,确保LRS。只有保形平坦加速完美流体是三个曲率导数需要确保LRS,表明埃利斯的原始条件,这种情况下是必要的,以及充分的。

英文摘要:

The weakest known criterion for local rotational symmetry (LRS) in spacetimes of Petrov type D is due to Goode and Wainwright (1986). Here it is shown, using methods related to the Cartan-Karlhede procedure, to be equivalent to local spatial rotation invariance of the Riemann tensor and its first derivatives. Conformally flat spacetimes are similarly studied and it is shown that for almost all cases the same criterion ensures LRS. Only for conformally flat accelerated perfect fluids are three curvature derivatives required to ensure LRS, showing that Ellis's original condition for that case is necessary as well as sufficient.

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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