Seminar detail: De Sitter Holography, –Should We See It from the Side or the Bottom?

Date&Time	Mon Apr 28 2025 (13:00 - 14:00)
Speaker	Kanato Goto
Affiliation	Osaka U
Title	De Sitter Holography, –Should We See It from the Side or the Bottom?–
Abstract	In this talk, we discuss the holographic duality between the double-scaled SYK model and quantum gravity in higher-dimensional de Sitter spacetime in the classical limit. Using "apparatus" defined with the operators in the SYK model, we appropriately define diffeomorphism-invariant physical quantities along a worldline of an observer in the de Sitter spacetime. Their two-point functions can reproduce Green’s function for a QFT on the d-dimensional de Sitter spacetime in the Bunch-Davies vacuum. In this talk, we discuss at the operator level why the physical observables defined on the worldline can be regarded as operators of the QFT on the de Sitter spacetime. Additionally, we study the relationship between the conventional dS/CFT approach, which uses quantum systems on the infinite past (future), and this new holographic principle based on an observer’s worldline.
Remarks
Slide/Video	video1