Holographic One-Point Function and Geodesics in SdS${}_3$

Grinberg-Maldacena showed that, for AdS/CFT, the thermal one-point function of a heavy boundary operator in the dual conformal field theory encodes the complex geodesic length from the boundary insertion to the black hole singularity. We show that for an appropriate choice of bulk-boundary kernel, an analogous result holds for three-dimensional Schwarzschild-de Sitter black hole. We prove the result for the case where SdS${}_3$ has a finite orbifold group.