一个光滑切片上的Schwarzschild黑洞态和熵
Schwarzschild black hole states and entropies on a nice slice
摘要:
在这项工作中,我们定义了一个量子引力态在一个很好的切片。这些漂亮的切片提供了时空的叶理,并避开了强曲率区域。我们探讨的拓扑结构和几何流形得到一个很好的切片后,在复杂的时间演变。计算了四维Schwarzschild黑洞的半经典热力学熵。尽管在一个好的切片上可以定义的状态不是全局纯态,但值得注意的是,我们得到了与霍金计算相似的结果。最后,我们讨论了在一个很好的切片上两个片段的纠缠熵,并评论了这项工作与复制虫孔计算的关系。
英文摘要:
In this work, we define a quantum gravity state on a nice slice. The nice slices provide a foliation of spacetime and avoid regions of strong curvature. We explore the topology and the geometry of the manifold obtained from a nice slice after evolving it in complex time. We compute its associated semiclassical thermodynamics entropy for a 4d Schwarzschild black hole. Despite the state one can define on a nice slice is not a global pure state, remarkably, we get a similar result to Hawking's calculation. In the end, we discuss the entanglement entropy of two segments on a nice slice and comment on the relation of this work with the replica wormhole calculation.
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