Null infinity and extremal horizons in AdS-CFT

Null infinity and extremal horizons in AdS-CFT
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AdS-CFT 中的零无穷大和极值视野

DOI:
10.1088/0264-9381/32/3/035008
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发表时间:
2015
影响因子:
3.5
通讯作者:
Hickling A
Hickling A
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Hickling A

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我们考虑AdS引力在具有零无穷大的背景时空上的CFT。共形边界上的无穷大可以扩展到整体的极值视界。例如,它对庞加莱-AdS是这样的,尽管对平面Schwarzschild-AdS不是。如果零无限延伸到一个极端的地平线在散装,我们表明,散装近地平线的几何形状是由边界零无限的几何形状。因此,“红外”几何的大部分是固定的大尺度行为的CFT时空。此外,边界应力张量在零无穷远处必须有一个特殊的衰减.作为一个应用,我们认为,对于CFT渐近平坦的背景下,任何静态体对偶包含一个极值视界从边界零无限延伸,必须有庞加莱-AdS的近视界几何。我们还讨论了一类边界的零无限,不能扩展到一个散装极值地平线,虽然我们给出的证据表明,他们可以扩展到一个类似的零表面的散装拥有相关的尺度不变的“近几何”。
We consider AdS gravity duals to CFT on background spacetimes with a null infinity. Null infinity on the conformal boundary may extend to an extremal horizon in the bulk. For example it does so for Poincaré–AdS, although does not for planar Schwarzschild–AdS. If null infinity does extend into an extremal horizon in the bulk, we show that the bulk near-horizon geometry is determined by the geometry of the boundary null infinity. Hence the'infra-red'geometry of the bulk is fixed by the large scale behaviour of the CFT spacetime. In addition the boundary stress tensor must have a particular decay at null infinity. As an application, we argue that for CFT on asymptotically flat backgrounds, any static bulk dual containing an extremal horizon extending from the boundary null infinity, must have the near-horizon geometry of Poincaré–AdS. We also discuss a class of boundary null infinity that cannot extend to a bulk extremal horizon, although we give evidence that they can extend to an analogous null surface in the bulk which possesses an associated scale-invariant'near-geometry'.
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