ITMP Seminar "Deformations of Extremal Black Holes"

Dear Colleagues,

We are pleased to welcome you to the last ITMP seminar this year. It will be held on Wednesday, Dec 18, 18:00 (Moscow time). It will be organised via Zoom. 

Speaker: Dr. Calvin Chen, Imperial College London & National Taiwan University

Abstract: This talk is based on arXiv:2408.05549 with Claudia de Rham and Andrew J. Tolley. I will start by introducing static perturbations to the near-horizon geometry of extremal black holes and black branes. 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.