Speaker
Description
Pole-skipping has emerged as a sharp, near-horizon signature
of many-body quantum chaos in holography. In this talk, I will
demonstrate how it generalizes to cosmological spacetimes and what it
reveals about the microscopic dynamics of de Sitter horizons. First,
in empty de Sitter and Schwarzschild-de Sitter geometries, I will map
the tower of pole-skipping points for scalar, Maxwell, and
gravitational perturbations and explain the constraints they impose on
bulk two-point functions. Focusing on the gravitational sound channel,
I will then relate this calculation to the scrambling of quanta
skimming the horizons and extract lessons about the structure of a
hypothetical dual description. I will conclude by proposing
microscopic toy models based on long-range and non-Hermitian
deformations of DSSYK-type chains that reproduce the qualitative
features observed in these settings.