Title: [NCTS-NTU String Theory Seminar] CFT duals of three-dimensional de Sitter gravity
Speaker: Mr. Yusuke Taki (YITP)
Time: May 20, 2022 (Fri) 14:30-15:30
Venue: Online & Rm. 815, Dept. of Physics, NTU (Hybrid)
Meeting Link:
https://nationaltaiwanuniversity-zbh.my.webex.com/nationaltaiwanuniversity-zbh.my/j.php?MTID=mf77b1c194d7d57768d2db53dc42697a0

Abstract:
dS/CFT correspondence, a holographic duality for de Sitter gravity, has not been well understood compared to AdS/CFT. We propose a class of dS/CFT correspondence between three-dimensional de Sitter spaces and two-dimensional CFTs. We argue that such a CFT includes an SU(2) WZW model in the critical level limit k->-2, which corresponds to the classical limit of the gravity side. This dS/CFT can be generalized to the higher-spin gravity on de Sitter space, which is dual to SU(N) WZW model with the limit k->-N. We confirm that under this proposed duality the classical partition functions in the gravity side can be reproduced from CFT calculations. Moreover, we analyze two-point functions and entanglement entropy in our dS/CFT correspondence.