Events

Date: 21 October 2025   Time: 14:00 - 15:30

Location: MB503

Title: Imaging black holes at high frequency

Abstract: We devise a formalism to probe local physics about a bulk point in general geometries using boundary correlators. In the exterior region, this allows for the factorization of boundary correlators in terms of flat-space like scattering amplitudes. The formalism also leads to direct measurements using lightcones emerging from the bulk point, capturing the boundary imprint of bulk causality.

Next, we use it to understand the physics of the black hole interior using the past lightcone, where we generalize known relations involving two-point correlators to spectral density tails and to four-point correlators. Details about the interior tunnel to the exterior at the cost of a Boltzmann suppression exp(-1/(2Tx)), where x is the desired spatial resolution. We comment on the relation (or lack thereof) between such measurements and the experience of infalling observers.