Heidelberg 2022 – wissenschaftliches Programm

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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 2: Gravity, Amplitudes, AdS/CFT

MP 2.2: Hauptvortrag

Montag, 21. März 2022, 16:45–17:15, MP-H5

Classical black hole scattering from a worldline quantum field theory — •Jan Plefka — Humboldt Universität zu Berlin, Germany

When two massive, gravitationally interacting bodies (black holes, neutron stars or stars) fly past each other they are deflected and emit gravitational Bremsstrahlung. I shall discuss how this classical two-body problem in general relativity can be efficiently described using worldline quantum field theory methods. Including spin (i.e. Kerr Black Holes or spinning neutron stars) leads to an effective N=2 supersymmetric description valid up to quadratic order in spins. The emitted gravitational waveform, scattering angle and spin-kick may be efficiently computed in a weak gravitational field (post Minkowskian) expansion and represent state of the art results. The worldline quantum field theory approach innovates over traditional approaches and imports modern technology from perturbative quantum field theory to classical perturbative GR.