PIRSA:22090075 Scientific Series Quantum Fields and Strings

DOI10.48660/22090075

Series: Quantum Fields and Strings

Raclariu, A. (2022). Celestial amplitudes from flat space limits of AdS Witten diagrams. Perimeter Institute. https://pirsa.org/22090075

Raclariu, Ana-Maria. Celestial amplitudes from flat space limits of AdS Witten diagrams. Perimeter Institute, Sep. 06, 2022, https://pirsa.org/22090075 

@misc{ pirsa_PIRSA:22090075,
  doi = {10.48660/22090075},
  url = {https://pirsa.org/22090075},
  author = {Raclariu, Ana-Maria},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Celestial amplitudes from flat space limits of AdS Witten diagrams},
  publisher = {Perimeter Institute},
  year = {2022},
  month = {sep},
  note = {PIRSA:22090075 see, \url{https://pirsa.org}}
}

Abstract

The search for pragmatic observables of quantum gravity remains at the forefront of fundamental physics research. A large set of ideas collectively known as the gauge-gravity duality have proven fruitful in tackling this problem. While such a duality is believed to universally govern gravitational theories, its nature in theories of gravity that describe our universe to a good degree of approximation is still little understood.

In this talk I will discuss efforts in formulating a holographic correspondence for gravity in four-dimensional asymptotically flat spacetimes. The proposed dual theory lives on a two-dimensional celestial sphere at infinity and is constrained by a wide range of symmetries. I present recent evidence for this proposal by showing that it arises naturally in a flat space limit of AdS/CFT. I will illustrate this construction with two related examples: the propagation of a particle in a shockwave background and the high-energy scattering of 2 particles.

Zoom Link: https://pitp.zoom.us/j/97426266597?pwd=UmhncFR6NExFVzI2SlJwdE1LeUlIQT09

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