论文标题
从通用视野中的时间定向性和粒子产生
Time Orientability and Particle Production from Universal Horizons
论文作者
论文摘要
我们讨论了在爱因斯坦（Einstein）和霍拉瓦（Horava）重力中具有通用地平线的粒子产生。我们认为，失去功能的连续性和不同性需要在地平线内部的叶面方向取向相对于外部的叶面。除非允许这样做，否则引力标量场与通用视野的相互作用会导致量子理论中的单位性违规。正如我们通过对所有静止和球面对称的空位明确计算其鹰温度的计算，该特性是由通用视野造成粒子产生的。我们将结果介绍为已知的分析解决方案，包括与观察性约束兼容的解决方案。
We discuss particle production in spacetimes endowed with a universal horizon in Einstein--Aether and Horava gravity. We argue that continuity and differentiability of the lapse function require the orientation of the foliation in the interior of the horizon to be reversed with respect to the exterior one. Unless this is allowed, interaction of gravitating scalar fields with the universal horizon leads to unitarity violations in the quantum theory. This property is responsible for particle production by the universal horizon, as we show by computing explicitly its Hawking temperature for all stationary and spherically symmetric spacetimes. We particularize our result to known analytic solutions, including those compatible with observational constraints.
