论文标题
关于de Sitter Spacetime的因果关系条件
On Causality Conditions in de Sitter Spacetime
论文作者
论文摘要
我们仔细考虑了由于de Sitter时空中黑洞和冲击波引起的夏皮罗时间延迟，并研究了因果关系的含义。我们讨论了如何使用在边界上测量的空间移位来定义``最快的零地球学''并考虑到Sitter Penrose图的``伸展''。我们认为在Sitter Shotter Shockwave背景中以$ rff $耦合的无质量自旋-1场的传播作为说明性示例。我们还简要讨论与ANEC的联系。
We carefully consider the Shapiro time delay due to black holes and shockwaves in de Sitter spacetime and study the implications for causality. We discuss how causality conditions of AdS and flat spacetime can be applied in de Sitter spacetime, using spatial shifts measured on the boundary to define ``fastest null geodesics" and taking into account the ``stretching" of the de Sitter Penrose diagram. We consider the propagation of a massless spin-1 field with an $RFF$ coupling in a de Sitter shockwave background as an illustrative example. We also briefly discuss connections to the ANEC.
