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Classical Gravitational Bremsstrahlung from a Worldline Quantum Field Theory

MPS-Authors
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Jakobsen,  Gustav Uhre
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Mogull,  Gustav
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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Steinhoff,  Jan
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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2101.12688.pdf
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Citation

Jakobsen, G. U., Mogull, G., Plefka, J., & Steinhoff, J. (2021). Classical Gravitational Bremsstrahlung from a Worldline Quantum Field Theory. Physical Review Letters, 126(20): 201103. doi:10.1103/PhysRevLett.126.201103.


Cite as: http://hdl.handle.net/21.11116/0000-0008-0E2E-7
Abstract
Using the recently established formalism of a worldline quantum field theory (WQFT) description of the classical scattering of two spinless black holes, we compute the far-field time-domain waveform of the gravitational waves produced in the encounter at leading order in the post-Minkowskian (weak field, but generic velocity) expansion. We reproduce previous results of Kovacs and Thorne in a highly economic way. Then using the waveform we extract the leading-order total radiated angular momentum, reproducing a recent result of Damour. Our work may enable crucial improvements of gravitational-wave predictions in the regime of large relative velocities.