论文标题
是否有引力波的回声？
Are there echoes of gravitational waves?
论文作者
论文摘要
在逃避信息悖论的几种方法中，半经典的黑洞被异国情调的物体（ECO）取代。已经猜想，ECOS合并发出的重力波可以反映ECO并产生可检测到的“回声”。我们认为，虽然波浪的一部分确实可以反射出生态的表面，但这种反射的波会被其自身反应产生的新封闭的封闭表面捕获。因此，没有回声的可检测信号将出现到无穷大。该分析中唯一的假设是，在轻度弯曲的时空中，因果关系保持领先顺序。因此，如果实际检测到回声，那么我们将面临对物理学理解的深刻变化。
In several approaches to evading the information paradox, the semiclassical black hole is replaced by an Exotic Compact Object (ECO). It has been conjectured that gravitational waves emitted by the merger of ECOs can reflect off the ECOs and produce a detectable `echo'. We argue that while a part of the wave can indeed reflect off the surface of an ECO, this reflected wave will get trapped by a new closed trapped surface produced by its own backreaction. Thus no detectable signal of the echo will emerge to infinity. The only assumption in this analysis is that causality is maintained to leading order in gently curved spacetime. Thus if echoes are actually detected, then we would face a profound change in our understanding of physics.
