Conveners
Gravity and curved space
- Olindo Corradini (Università di Modena e Reggio Emilia )
Gravity and curved space
- Anton Ilderton (University of Edinburgh)
Gravity and curved space
- Anton Ilderton (University of Edinburgh)
- James Edwards (Univeristy of Plymouth)
The quest of the perturbative post-Minkowskian study of the gravitational two body problem has recently seen advances upon employing quantum field theory techniques. I report on a novel approach based on a worldline quantum field theory that provides an efficient way to study the classical scattering of two massive objects (black holes, neutron stars or stars) in GR.
We are able to directly...
The techniques of scattering amplitudes in quantum field theory have been applied successfully to the description of black hole scattering in recent years. In this talk, I will analyze three instances where QED can be used to great advantage as a toy model (or building block) of the gravity case.
Over the last 30 years, there has been intensive work and incredible progress in our understanding of perturbative scattering amplitudes in gauge theory and gravity, but so far these advances have not addressed strong background fields. In this talk, I will try to convince you that there is actually an un-tapped wealth of connections between the amplitudes and strong field communities, which...
Quantum Electrodynamics (QED) serves as a useful toy model for classical observables in gravitational two-body systems with reduced complexity due to the linearity of QED. We investigate scattering observables in scalar QED at the sixth order in the charges (two-loop order) in a classical regime analogous to the post-Minkowskian expansion in General Relativity. We use modern methods to compute...
The KMOC approach is a formalism that expresses classical observables on flat backgrounds in terms of quantum scattering amplitudes. After a first review, I will show two generalizations of the original framework by extending its range of application to classical wave physics and observables on a curved background. Using these, I will prove how to compute the bending of light and waveforms...
We study the space of quantum and classical observables for the radiation emitted by a scalar moving in gauge and gravitational plane-wave backgrounds. We explore the structure of new localised observables such as the momentum and angular momentum flow, as well as their global analogues. We observe that classical observables exhibit a power-law divergence in QED and a logarithmic divergence...
