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arXiv 2001.00020hep-th
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曲名:Warped Flatland

Warped Flatland

Stéphane Detournay, Wout Merbis, Gim Seng Ng, Raphaela Wutte

摘要:

我们研究三维拓扑大质量引力中的翘曲平面几何。它们是整体弯曲平坦时空的等价物,其等距由2维中心扩展的庞加莱代数给出。后者可以作为具有正宇宙学常数的Warped AdS 3空间的一定标度极限而得到。我们讨论的因果结构的时空使用投影图。我们研究他们的收费和热力学,连同渐近Killing矢量保持一组一致的边界条件,包括他们。渐近对称群由Warped CFT代数给出,电流电平为零。在这种情况下,一个广义的弯曲卡迪公式的推导也适用,它再现了弯曲平坦宇宙时空的熵。

英文摘要:

We study warped flat geometries in three-dimensional topologically massive gravity. They are quotients of global warped flat spacetime, whose isometries are given by the 2-dimensional centrally extended Poincaré algebra. The latter can be obtained as a certain scaling limit of Warped AdS3 space with a positive cosmological constant. We discuss the causal structure of the resulting spacetimes using projection diagrams. We study their charges and thermodynamics, together with asymptotic Killing vectors preserving a consistent set of boundary conditions including them. The asymptotic symmetry group is given by a Warped CFT algebra, with a vanishing current level. A generalization of the derivation of the Warped Cardy formula applies in this case, reproducing the entropy of the warped flat cosmological spacetimes.

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