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arXiv 1905.09809hep-th
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将AdS3/CFT2提升为平面空间全息

Uplifting AdS3/CFT2 to Flat Space Holography

Adam Ball, Elizabeth Himwich, Sruthi A. Narayanan, Sabrina Pasterski, Andrew Strominger

摘要:

四维(4D)平坦Minkowski空间允许双曲切片的叶理。欧几里德AdS 3切片填充原点的过去和未来光锥,而dS 3切片填充光锥之外的区域。本文探讨了四维渐近平坦量子引力与AdS 3/CFT 2之间的联系。扩展的BMS 4群中的4D超旋转被发现充当3D双曲切片上的熟悉的保角变换,将每个切片映射到其自身。在协变相空间中构造了相应的四维超旋荷。软的部分给出了二维应力张量,其作用于双曲线切片边界处的天球,并且被示出为是熟悉的三维全息AdS 3应力张量的4D的提升。最后,我们发现,4D量子引力包含一个意想不到的第二,共形软,(2,0)维模式,是辛配对的天体应力张量。

英文摘要:

Four-dimensional (4D) flat Minkowski space admits a foliation by hyperbolic slices. Euclidean AdS3 slices fill the past and future lightcones of the origin, while dS3 slices fill the region outside the lightcone. The resulting link between 4D asymptotically flat quantum gravity and AdS3/CFT2 is explored in this paper. The 4D superrotations in the extended BMS4 group are found to act as the familiar conformal transformations on the 3D hyperbolic slices, mapping each slice to itself. The associated 4D superrotation charge is constructed in the covariant phase space formalism. The soft part gives the 2D stress tensor, which acts on the celestial sphere at the boundary of the hyperbolic slices, and is shown to be an uplift to 4D of the familiar 3D holographic AdS3 stress tensor. Finally, we find that 4D quantum gravity contains an unexpected second, conformally soft, dimension (2, 0) mode that is symplectically paired with the celestial stress tensor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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