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arXiv 1802.09663gr-qc
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反类德西特时空的Killing边界数据

Killing boundary data for anti-de Sitter-like spacetimes

Diego A. Carranza, Juan A. Valiente Kroon

摘要:

给出一个反德西特时空的初边值问题,我们分析了保形边界上的条件,确保Killing矢量的存在性在时空中产生的这个问题。这种分析利用了一个系统的共形波方程描述传播的Killing方程首先考虑Paetz。我们确定了一个障碍张量构造的Killing矢量候选人和棉花张量的共形边界的消失是一个必要条件的Killing矢量在时空中。如果共形边界是共形平坦的,则这个阻塞张量为零。

英文摘要:

Given an initial-boundary value problem for an anti-de Sitter-like spacetime, we analyse conditions on the conformal boundary ensuring the existence of Killing vectors in the spacetime arising from this problem. This analysis makes use of a system of conformal wave equations describing the propagation of the Killing equation first considered by Paetz. We identify an obstruction tensor constructed from Killing vector candidate and the Cotton tensor of the conformal boundary whose vanishing is a necessary condition for the existence of Killing vectors in the spacetime. This obstruction tensor vanishes if the conformal boundary is conformally flat.

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