From QFT amplitudes to wave scattering in Kerr

Abstract: In recent years, a striking connection between QFT scattering amplitudes and classical black hole physics has been developed.In this talk we will consider the scattering of massless waves off a Kerr black hole. The classical Newman-Penrose amplitudes are found to coincide with certain QFT amplitudes at finite values of the scattering angle, provided 1) a precise classical limit is implemented on the QFT side and 2) the black hole background is modelled as an interacting matter particle with spin. The QFT amplitudes describe the $2\to 2$ tree-level scattering of a helicity-$|h|$ particle with a massive spin-S particle, where the spin can be taken arbitrarily high. We will finally discuss the application of our results to the computation of gravitational radiation in the (bounded) two-body problem.

cosmology and nongalactic astrophysicsother condensed matterquantum gasesstrongly correlated electronssuperconductivitygeneral relativity and quantum cosmologyHEP - theory

Audience: researchers in the topic

Carnegie Mellon theoretical physics