Gravitational memory and compact extra dimensions
Gravitational memory and compact extra dimensions
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DOI：
10.1103/physrevd.105.024072
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发表时间：
2021-09
影响因子：
5
通讯作者：
Christian Ferko;Gautam Satishchandran;S. Sethi
中科院分区：
文献类型：
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作者：
Christian Ferko;Gautam Satishchandran;S. Sethi
在具有任意Ricci平坦内部空间的理论中，我们发展了处理I+附近辐射自由度的一般形式。这些辐射模式被编码在广义新闻张量中，该张量被分解为引力、电磁和标量分量。我们找到了一个优选的规范，它简化了完全非线性爱因斯坦方程的渐近分析，并使渐近对称群透明。这个渐近对称群扩展了BMS群以包括内部空间的角度相关的等距。我们应用这种形式来研究记忆效应，这种效应预计将在未来的实验中观察到，这种效应是由更高维引力辐射的爆发引起的。我们概述了由引力波观测站进行的测量如何探测紧凑的额外维度的性质。AR X IV：2 10 9 11 59 9 V 2[GR-Q c]1 9 O ct 2 02 1
We develop a general formalism for treating radiative degrees of freedom near I + in theories with an arbitrary Ricci-flat internal space. These radiative modes are encoded in a generalized news tensor which decomposes into gravitational, electromagnetic, and scalar components. We find a preferred gauge which simplifies the asymptotic analysis of the full nonlinear Einstein equations and makes the asymptotic symmetry group transparent. This asymptotic symmetry group extends the BMS group to include angle-dependent isometries of the internal space. We apply this formalism to study memory effects, which are expected to be observed in future experiments, that arise from bursts of higher-dimensional gravitational radiation. We outline how measurements made by gravitational wave observatories might probe properties of the compact extra dimensions. ar X iv :2 10 9. 11 59 9v 2 [ gr -q c] 1 9 O ct 2 02 1