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arXiv 1809.03307gr-qc
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曲率-物质耦合对轴向引力波的影响

Curvature-Matter Coupling Effects on Axial Gravitational Waves

M. Sharif, Aisha Siddiqa

摘要:

本文在$f(R,T)$理论中研究了轴向引力波在平坦FRW宇宙背景中的传播。得到了无扰动和轴向扰动FRW度规的场方程。这些场方程同时求解,以获得未知的扰动参数。我们发现,假设的扰动可以影响物质以及四速度。此外,忽略材料扰动,我们明确地获得了四速度的表达式。结果表明,在曲率-物质耦合背景下,轴向引力波可以产生宇宙旋转,如果波廓在波前处有不连续性,则具有记忆效应。

英文摘要:

In this paper, we investigate the propagation of axial gravitational waves in the background of the flat FRW universe in $f(R,T)$ theory. The field equations are obtained for unperturbed as well as axially perturbed FRW metric. These field equations are solved simultaneously to obtain the unknown perturbation parameters. We find that the assumed perturbations can affect matter as well as four-velocity. Moreover, ignoring the material perturbations we explicitly obtain an expression for four-velocity. It is concluded that axial gravitational waves in the curvature-matter coupling background can produce cosmological rotation or have memory effect if the wave profile has a discontinuity at the wavefront.

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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