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Celestial Holography Initiative

Celestial Holography aims to apply the holographic principle to spacetimes with vanishing cosmological constant. It maps four-dimensional scattering matrix elements to correlators in a two-dimensional conformal field theory living on the night sky. This map possesses a number of surprising features. It emphasizes infinite-dimensional symmetry enhancements, which are typically hidden in infrared factorization theorems for amplitudes; reorganizes collinear limits as conformal field theory operator product expansions, and mixes ultraviolet and infrared behaviour in a manner that will allow us to make general claims about scattering not obvious from perturbation theory.

The Celestial Holography Initiative at Perimeter Institute is a collaborative research hub for scientists working at the forefront of this fast-emerging field.

Watch Sabrina Pasterski’s 2021 talk “Celestial Amplitudes Program Review”


Principal Investigator


  • Yangrui Hu (2022)
  • Bin Zhu (2023 visitor)
  • Adam Ball (2023)

Sabrina Pasterski is a high energy theorist who joined Perimeter's Faculty in 2021. She earned her undergraduate degree from MIT, received her PhD from Harvard, and just completed a postdoc at Princeton. Her work on the infrared triangle, spin memory effect, and celestial holographic dictionary helped usher an interdisciplinary program she is excited to bring to PI. The Celestial Holography Initiative will attract leading researchers from the relativity, amplitudes, and bootstrap communities to tackle fundamental questions about quantum gravity in asymptotically flat spacetimes.