论文标题
蠕虫空间中的重力波记忆
Gravitational wave memory in wormhole spacetimes
论文作者
论文摘要
在某些类别的braneworld虫洞的背景下，研究了引力波记忆。与其他虫洞几何形状不同，这种新颖的虫洞类别不需要任何异国情调的物质领域的遍历。首先，我们在存在引力波脉冲的情况下研究了这个虫洞时空中的大地测量。测量分离的结果演变显示出位移和速度记忆效应的存在。在同时的动机上，我们使用邦迪 - 萨克斯的形式主义研究了无限无限的记忆效应，该形式适用于Braneworld虫洞。我们的分析提供了在重力辐射爆发后的债券质量的非平凡变化，因此表现出零无穷大的记忆效应。在这两个练习中，额外的维度和时空几何形状的虫洞性质都在记忆效果中印象深刻。由于未来的重力波检测器将能够探测记忆效应，因此目前的工作为搜索黑洞以外的紧凑对象提供了另一种途径。
Gravitational wave memory is studied in the context of a certain class of braneworld wormholes. Unlike other wormhole geometries, this novel class of wormholes do not require any exotic matter fields for its traversability. First, we study geodesics in this wormhole spacetime, in the presence of a gravitational wave pulse. The resulting evolution of the geodesic separation shows the presence of displacement and velocity memory effects. Motivated by the same, we study the memory effects at null infinity using the Bondi-Sachs formalism, adapted for braneworld wormhole. Our analysis provides a non-trivial change of the Bondi mass after the passage of a burst of gravitational radiation and hence manifests the memory effect at null infinity. In both of these exercises, the presence of extra dimension and the wormhole nature of the spacetime geometry gets imprinted in the memory effect. Since future gravitational wave detectors will be able to probe the memory effect, the present work provides another avenue to search for compact objects other than black holes.
