Amphithéâtre Maurice Halbwachs, Site Marcelin Berthelot
En libre accès, dans la limite des places disponibles


10h-11h : Netta Engelhardt (MIT, USA)

Cryptographic Censorship: A Quantum Complexity Approach to (Quantum) Cosmic Censorship

Résumé : Do naked singularities exist as typical states in quantum gravity? Various considerations, from black hole thermodynamics to empirical observations, suggest that the answer is no. Nevertheless, in the past decade, numerous generic solutions to GR in four spacetime dimensions have been found to be likely candidates for naked singularity formation. In this talk, I’ll give evidence that such solutions are expected to be in the swampland, and give a theorem that, under certain assumptions, guarantees that event horizons do in fact exist in typical states in quantum gravity in the context of AdS/CFT.

11h-11h30 : Pause

11h30-12h30 : Sean Hartnoll (University of Cambridge, UK)

Arithmetic Chaos Inside Black Holes

Résumé : It has been known for over 50 years that spacetime dynamics becomes chaotic in the approach to singularities. Furthermore, the classical gravitational dynamics exhibits remarkable number-theoretic properties known as arithmetic chaos. I will review these facts and give an explicit realisation of these phenomena in the interior of an asymptotically AdS black hole. I will discuss possible implications for the nature of black hole singularities and black hole thermodynamics.

14h30-15h30 : Laura Donnay (SISSA, Italy)

Tracking Celestial and Carrollian Theories

Résumé : In this talk, I will present recent developments towards formulating a holographic correspondence for asymptotically flat spacetimes. In particular, I will discuss the role of newly uncovered symmetries in the so-called celestial and Carrollian holographic proposals.

15h30-16h : Pause


Netta Engelhardt


Sean Hartnoll

University of Cambridge, UK

Laura Donnay

SISSA, Italy