标题： 黑洞阴影和混沌界限违反在$f(T)$仿射引力中 显示英文标题

标题： Black hole shadow and chaos bound violation in $f(T)$ teleparallel gravity

摘要： 我们证明了由马尔达塞纳、沈克和斯坦福提出的所谓混沌界限，在$f(T)$仿射引力中可以被违反。特别是，可以在黑洞光子球中选择一个新的引力李雅普诺夫参数，控制圆轨道的混沌化，该参数可以超过马尔达塞纳、沈克和斯坦福的热界限。这一特性改变了黑洞合并后的标准准正则模式和回波阶段，对未来引力波探测和黑洞阴影测量有引人入胜的含义。这是超越标准广义相对论的几种引力理论的一个普遍特性。 显示英文摘要

摘要： We show that the so-called chaos bound, proposed by Maldacena, Shenker, and Stanford, can be violated in $f(T)$ teleparallel gravity. In particular, it is possible to select a new gravitational Lyapunov parameter, controlling chaotization of circular trajectories, in black hole photo-sphere, that can exceed the Maldacena, Shenker and Stanford thermal bound. This feature alters the standard quasi-normal modes and ringdown phase after black hole merging with intriguing implications for future gravitational wave detections and black hole shadow measurements. It is a general characteristic for several gravitational theories beyond standard General Relativity.