KITS-JC

Time: 13:30-15:00 2023/04/28

Location: 401, 7th building, KITS

Speaker:  Shaohua Xue (PKU)

Title: An Algebra of Observables for de Sitter Space 

Abstract: In this talk, we will review and discuss how to introduce an algebra of observables for de Sitter space. Because of UV divergence of entanglement entropy based on Type III algebra in QFT, Type II1 algebra become a candidate for de Sitter space. We will briefly review the von Neumann algebra of Type II1 and try to define the entropy. Then we can find that the expected bulk formula of general entropy forms as S_gen=(A/4G_N)+ S_out. Finally, I will  refer to some comments on a parodox of Susskind on the correlation function in dS holography.

Reference: arXiv: 2304.00589,  arXiv: 2206.10780