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Complex saddles of three-dimensional de Sitter gravity via holography

来源: 04-19

时间:2023-04-19 Wed 14:30-17:00

地点:Venue:1137 ZOOM:886 0029 7150(PW: 509836)

组织者:Hongfei Shu, Hao Zou, Ruidong Zhu

主讲人:2023-04-19 Wed

Abstract

It would be useful to deal with complex geometry when examining quantum gravity as in the case of no-boundary proposal by Hartle and Hawking. However, there would be too many saddles for complexified gravity, and it is necessary to determine which are allowable geometries in the sense of Witten. We consider three-ddimensional gravity theory with positive consmological constant described by Chern-Simons gauge theory. In this talk, we first propose a dS/CFT correspondence involving the Chern-Simons gravity and provide strong evidence for it. Applying the holography, we then determine the set of allowable complex saddles for the Chern-Simons gravity from its dual conformal field theory.

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