The harder they fall, the bigger they become: tidal trapping of strings by microstate geometries
The harder they fall, the bigger they become: tidal trapping of strings by microstate geometries
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它们下落得越重，就变得越大：微观状态几何形状对弦的潮汐捕获
DOI：
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发表时间：
2020
影响因子：
5.4
通讯作者：
N. Warner
中科院分区：
文献类型：
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作者：
E. Martinec;N. Warner
我们考虑的命运，一个无质量（或超相对论大质量）弦探针传播下的BTZ状喉的微观几何的D1-D5系统。在喉咙深处，探测器遇到了巨大的潮汐力，拉伸并激发了弦。通过大潮汐力区域的非常短的渡越时间限制了激发，导致潮汐拉伸的受控近似。我们发现，拉伸的量与入射能量成正比，并且它剥夺了探针返回喉部所需的动能。因此，探测器被有效地捕获在喉部深处，并通过反复的返回通道，进入附近微观状态的集合。我们认为，这种潮汐捕获可能会导致微弱的引力回波。
We consider the fate of a massless (or ultra-relativistic massive) string probe propagating down the BTZ-like throat of a microstate geometry in the D1-D5 system. Far down the throat, the probe encounters large tidal forces that stretch and excite the string. The excitations are limited by the very short transit time through the region of large tidal force, leading to a controlled approximation to tidal stretching. We show that the amount of stretching is proportional to the incident energy, and that it robs the probe of the kinetic energy it would need to travel back up the throat. As a consequence, the probe is effectively trapped far down the throat and, through repeated return passes, scrambles into the ensemble of nearby microstates. We propose that this tidal trapping may lead to weak gravitational echoes.
快速旋转黑洞内的马洛夫-奥里奇点
影响因子：
5
作者：
Burko, Lior M.;Khanna, Gaurav
通讯作者：
Khanna, Gaurav
影响因子：
5.4
作者：
Felicity C. Eperon;H. Reall;Jorge E Santos
通讯作者：
Felicity C. Eperon;H. Reall;Jorge E Santos