PIRSA:25060018 Conference Quantum Gravity Quantum Information

DOI10.48660/25060018

Conference/School: QIQG 2025

Verheijden, E. (2025). Randomizing excitations of half-BPS states gives near-extremal black holes. Perimeter Institute. https://pirsa.org/25060018

Verheijden, Evita. Randomizing excitations of half-BPS states gives near-extremal black holes. Perimeter Institute, Jun. 24, 2025, https://pirsa.org/25060018 

@misc{ pirsa_PIRSA:25060018,
  doi = {10.48660/25060018},
  url = {https://pirsa.org/25060018},
  author = {Verheijden, Evita},
  keywords = {Quantum Gravity, Quantum Information},
  language = {en},
  title = {Randomizing excitations of half-BPS states gives near-extremal black holes},
  publisher = {Perimeter Institute},
  year = {2025},
  month = {jun},
  note = {PIRSA:25060018 see, \url{https://pirsa.org}}
}

Abstract

I will discuss a concrete realization in N=4 SYM of the mechanism of cryptographic censorship: that sufficiently random time evolution in a holographic CFT incurs an event horizon in the bulk dual. I will show that perturbing half-BPS states by randomly distributing a large number of defects on them corresponds in the gravitational dual to exciting an extremal (horizonless) black hole to near-extremality. This random distribution of defects corresponds to acting with a typical random isometry on the half-BPS subspace. This allows us to interpret this process in the field theory as an extension of cryptographic censorship.

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