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arXiv 1603.09477gr-qc
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非局部引力:共形平坦时空

Nonlocal gravity: Conformally flat spacetimes

Donato Bini, Bahram Mashhoon

摘要:

爱因斯坦引力理论最近的非定域推广的场方程,以一种让人想起广义相对论的形式提出。在共形平坦时空的情况下,研究了非定域场方程的含义。即使在这种简单的情况下,场方程也是难以处理的。因此,为了深入了解这些方程的性质,我们研究了二维时空中非局域引力的结构。虽然任何光滑的2D时空都是共形平坦的,并且满足爱因斯坦场方程,但只有包含Killing向量或位似Killing向量的子集才能满足非局部引力场方程。

英文摘要:

The field equations of the recent nonlocal generalization of Einstein's theory of gravitation are presented in a form that is reminiscent of general relativity. The implications of the nonlocal field equations are studied in the case of conformally flat spacetimes. Even in this simple case, the field equations are intractable. Therefore, to gain insight into the nature of these equations, we investigate the structure of nonlocal gravity in two-dimensional spacetimes. While any smooth 2D spacetime is conformally flat and satisfies Einstein's field equations, only a subset containing either a Killing vector or a homothetic Killing vector can satisfy the field equations of nonlocal gravity.

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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