Events

Date: 18 March 2025   Time: 14:00 - 15:00     

Location: MB503

Title: Deformations of Extremal Black Holes

Abstract: In this talk, I will re-examine a class of extremal charged black holes in AdS and study their EFT corrections. I will start by introducing static perturbations to the near-horizon geometry of extremal black holes. It turns out these generically suffer from singularities of various degrees. Particular deformations are marginal – they are not singular in GR, but even arbitrarily small EFT corrections seem to be able to make them singular. I will clarify that the apparent UV sensitivity does not lead to a breakdown of EFT, demonstrating this with a particular UV completion. If time permits, I will discuss a speculative bound on EFT coefficients. These are closely related to otherwise known bounds from causality and the swampland program, and would provide direct insight into UV completions to GR.