Seminar detail: CFT duals of three-dimensional de Sitter gravity

Date&Time	Wed Feb 02 2022 (14:00 - 15:00)
Speaker	Tatsuma Nishioka
Affiliation	Yukawa Institute
Title	CFT duals of three-dimensional de Sitter gravity
Abstract	We present a class of dS/CFT　correspondence between two-dimensional CFTs and three-dimensional de Sitter spaces. We argue that such a CFT includes an SU(2) WZW model in the critical level limit k → −2, which corresponds to the classical gravity limit. We can generalize this dS/CFT by considering the SU(N) WZW model in the critical level limit k →−N, dual to the higher spin gravity on a three-dimensional de Sitter space. We confirm that under this proposed duality the classical partition function in the gravity side can be reproduced from CFT calculations. We also point out a duality relation known in higher spin holography provides further evidence. Moreover, we analyze two-point functions and entanglement entropy in our dS/CFT correspondence.
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