The Relation Between KMOC and Worldline Formalisms for Classical Gravity
High Energy Physics - Theory
2023-09-06 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We demonstrate the equivalence between KMOC and worldline formalisms for classical general relativity, highlighting how the Keldysh-Schwinger in-in formalism is contained in both of them even though the KMOC representation conventionally leads to the evaluation of scattering amplitudes with Feynman propagators. The relationship between the two approaches is illustrated in detail for the momentum kick at second Post-Minkowskian order.
Cite
@article{arxiv.2306.11454,
title = {The Relation Between KMOC and Worldline Formalisms for Classical Gravity},
author = {Poul H. Damgaard and Elias Roos Hansen and Ludovic Planté and Pierre Vanhove},
journal= {arXiv preprint arXiv:2306.11454},
year = {2023}
}
Comments
39 pages. v2: Some clarifications and references added. Version to appear in JHEP