论文标题
Kerr-de保姆时空及其平坦极限
Islands in Kerr-de Sitter spacetime and their flat limit
论文作者
论文摘要
我们使用量子极端岛方法来研究某些宇宙学设置的信息悖论，称为三维Kerr-De保姆的空间。为此，我们将一个辅助平地浴系统与平时的奇异性搭配到了这个时空，并测量其渐近区域中鹰辐射的熵，在其重力很弱。我们表明，将岛屿区域添加到缠结的辐射楔中会导致其熵遵循页面曲线。岛屿的边界，即极端量子表面位于直接连接到浴室的区域的宇宙学范围之外。从岛屿的位置及其在Kerr-De保姆SAPC时期中的相关计算获得扁平空间的限制会导致扁平空间宇宙学（FSC）岛，并在我们之前的论文中获得的拼凑时间以及页面时间。我们重复对纯的保姆时空的相同计算，并表明我们的设置忽略了反应的效果，也导致了宇宙学范围之外的量子极端表面。我们计算了争夺时间，并确认了纯de Sitter Spacetime是一个快速的扰动者的想法。
We use quantum extremal island method to study the information paradox on certain cosmological setups known as three dimensional Kerr-de Sitter spacetimes. To do so, we couple an auxiliary flat bath system to this spacetime in timelike singularity and measure entropy of hawking radiation in its asymptotic regions where the gravity is weak. We show that adding island regions to the entanglement wedge of radiation causes its entropy to obey Page curve. The boundary of island i.e. quantum extremal surface is located outside the cosmological horizon in the region connected directly to the bath. Taking the flat-space limit from the location of island and its related calculation in the Kerr-de Sitter sapcetime results in the flat-space cosmology (FSC) island, scrambling time and also Page time that were obtained in our previous paper. We repeat the same calculation for the pure de Sitter spacetime and show that our setup which neglects the effect of backreaction, leads also to a quantum extremal surface outside the cosmological horizon. We calculate the scrambling time and confirm the idea that pure de Sitter spacetime is a fast scrambler.
