Seminar detail: Pole-skipping in two-dimensional de Sitter spacetime and double-scaled SYK model

Date&Time	Tue Oct 22 2024 (17:00 - 18:00)
Speaker	Xian-Hui Ge
Affiliation	Shanghai University
Title	Pole-skipping in two-dimensional de Sitter spacetime and double-scaled SYK model
Abstract	We develop the pole-skipping structure in de Sitter (dS) spacetime and find that their leading frequencies satisfy the relation ωdS=i2πTdS(1−s) with TdS denotes TdS=1/2πL and s spin. In the two-dimensional dS spacetime, the pole-skipping points near the cosmic horizon r=L for the scalar field of spin-0 and the fermionic field of spin-1/2 correspond one-to-one with those in the infinite temperature limit of double-scaled Sachdev-Ye-Kitaev model (DSSYK∞). The retarded Green's functions of these two systems also have similar forms at the pole-skipping positions. This provides a numerical correspondence between the static patch of dS2 spacetime and the DSSYK∞ model.
Remarks	Zoom link: https://us06web.zoom.us/j/89518126028
Slide/Video	video1