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General Relativity from Scattering Amplitudes.

08:00 EDT 26th October 2018 | BioPortfolio

Summary of "General Relativity from Scattering Amplitudes."

Weoutline the program to apply modern quantum field theory methods to calculate observables in classical general relativity through a truncation to classical terms of the multigraviton, two-body, on-shell scattering amplitudes between massive fields. Since only long-distance interactions corresponding to nonanalytic pieces need to be included, unitarity cuts provide substantial simplifications for both post-Newtonian and post-Minkowskian expansions. We illustrate this quantum field theoretic approach to classical general relativity by computing the interaction potentials to second order in the post-Newtonian expansion, as well as the scattering functions for two massive objects to second order in the post-Minkowskian expansion. We also derive an all-order exact result for gravitational light-by-light scattering.

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This article was published in the following journal.

Name: Physical review letters
ISSN: 1079-7114
Pages: 171601

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