403 citations · 4.2k across the 74 of their papers we have counts for
75 papers
Iterative Solution of the Kerr Black Hole Metric
Poul H. Damgaard, Hojin Lee, Kanghoon Lee +1
Using a recursive solution of the Einstein equations, we consider the perturbative expansion of the metric corresponding to a Kerr black hole. Because the metric is a function of t…
Gravitational Metric of a Star
Poul H. Damgaard, Hojin Lee, Kanghoon Lee +1
Solving the classical equations of motion in general relativity recursively, we consider the metric of a spatially localized and stationary source of matter. Having in mind a star…
Classical Observables from the Exponential Representation of the Gravitational S-Matrix
Poul H. Damgaard, Elias Roos Hansen, Ludovic Planté +1
By combining the KMOC-formalism with the exponential representation of the scattering matrix we show that the two-body scattering angle is given by the corresponding matrix element…
The Relation Between KMOC and Worldline Formalisms for Classical Gravity
Poul H. Damgaard, Elias Roos Hansen, Ludovic Planté +1
We demonstrate the equivalence between KMOC and worldline formalisms for classical general relativity, highlighting how the Keldysh-Schwinger in-in formalism is contained in both o…
Scattering Angles in Kerr Metrics
Poul H. Damgaard, Jitze Hoogeveen, Andres Luna +1
Scattering angles for probes in Kerr metrics are derived for scattering in the equatorial plane of the black hole. We use a method that naturally resums all orders in the spin of t…
The SAGEX Review on Scattering Amplitudes, Chapter 13: Post-Minkowskian expansion from Scattering Amplitudes
N. E. J. Bjerrum-Bohr, P. H. Damgaard, L. Plante +1
The post-Minkowskian expansion of Einstein's general theory of relativity has received much attention in recent years due to the possibility of harnessing the computational power o…