论文标题
它们掉越难，越大：潮汐捕获弦曲线，微晶格几何形状
The Harder They Fall, the Bigger They Become: Tidal Trapping of Strings by Microstate Geometries
论文作者
论文摘要
我们考虑了D1-D5系统中微晶格几何形状的BTZ样喉咙的无质量（或超级质量质量）弦探针的命运。在喉咙上很远，探针遇到了伸展并激发绳子的大潮汐力。激发受到较短的潮汐力区域的非常短的过境时间的限制，从而导致对潮汐拉伸的受控近似。我们表明，拉伸的量与入射能量成正比，并且抢劫了返回喉咙所需的动能的探测器。结果，探针被有效地捕获到喉咙远处，并通过反复的返回通过，将其争夺到附近的微晶体的合奏中。我们建议这种潮汐捕获可能导致引力较弱的回声。
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.
