Journal
GENERAL RELATIVITY AND GRAVITATION
Volume 50, Issue 12, Pages -Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10714-018-2475-0
Keywords
Scattering amplitudes; Astrophysics; Light bending; Gravitational waves; Quantum field theory; S matrix
Funding
- Claude Leon Foundation of South Africa
- South African National Institute for Theoretical Physics (NITheP)
- NSF at the Institute for Advanced Study [PHY-1606531]
- NRF at the University of Cape Town [GUN 87667]
- Institute for Advanced study
- Simons Foundation
- Flatiron Institute
- Princeton University Astrophysics department
- South African Research Chairs Initiative of the Department of Science and Technology
- National Research Foundation of South Africa
Ask authors/readers for more resources
The use of quantum field theory to understand astrophysical phenomena is not new. However, for the most part, the methods used are those that have been developed decades ago. The intervening years have seen some remarkable developments in computational quantum field theoretic tools. In particle physics, this technology has facilitated calculations that, even ten years ago would have seemed laughably difficult. It is remarkable, then, that most of these new techniques have remained firmly within the domain of high energy physics. We would like to change this. As alluded to in the title, this paper is aimed at showcasing the use of modern on-shell methods in the context of astrophysics and cosmology. In this article, we use the old problem of the bending of light by a compact object as an anchor to pedagogically develop these new computational tools. Once developed, we then illustrate their power and utility with an application to the scattering of gravitational waves.
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