arXiv 2207.005692022-07hep-thgr-qc

All Things Retarded: Radiation-Reaction in Worldline Quantum Field Theory

Gustav Uhre Jakobsen, Gustav Mogull, Jan Plefka, Benjamin Sauer

备注：: 43 pages including refs

英文摘要：

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.

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