All things retarded: radiation-reaction in worldline quantum field theory

A bstract We exhibit an initial-value formulation of the worldline quantum field theory (WQFT) approach to the classical two-body problem in general relativity. We show that the Schwinger-Keldysh (in-in) formalism leads to purely retarded propagators in the evaluation of observables in the WQFT. Int...

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Veröffentlicht in:The journal of high energy physics 2022-10, Vol.2022 (10), p.128-41, Article 128
Hauptverfasser: Jakobsen, Gustav Uhre, Mogull, Gustav, Plefka, Jan, Sauer, Benjamin
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Sprache:eng
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Zusammenfassung:A bstract We exhibit an initial-value formulation of the worldline quantum field theory (WQFT) approach to the classical two-body problem in general relativity. We show that the Schwinger-Keldysh (in-in) formalism leads to purely retarded propagators in the evaluation of observables in the WQFT. Integration technology for retarded master integrals is introduced at third post-Minkowskian (3PM) order. As an application we compute the complete radiation-reacted impulse and radiated four momentum for the scattering of two non-spinning neutron stars including tidal effects at 3PM order, as well as the leading (2PM) far-field gravitational waveform.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP10(2022)128