184 citations · 651 across the 16 of their papers we have counts for
16 papers
Cosmology and the classical limit of the S-matrix
Katsuki Aoki, Andrea Cristofoli
We investigate the relationships between classical observables in cosmology and the classical limit of quantum scattering amplitudes. We first look at the relation between Bogoliub…
Scattering amplitudes for self-force
Tim Adamo, Andrea Cristofoli, Anton Ilderton +1
The self-force expansion allows the study of deviations from geodesic motion due to the emission of radiation and its consequent back-reaction. We investigate this scheme within th…
Large Gauge Effects and the Structure of Amplitudes
Andrea Cristofoli, Asaad Elkhidir, Anton Ilderton +1
We show that large gauge transformations modify the structure of momentum conservation leading to non-vanishing three-point amplitudes in a simple toy model of a gravitational wave…
All order gravitational waveforms from scattering amplitudes
Tim Adamo, Andrea Cristofoli, Anton Ilderton +1
Waveforms are classical observables associated with any radiative physical process. Using scattering amplitudes, these are usually computed in a weak-field regime to some finite or…
The ultrarelativistic limit of Kerr
Tim Adamo, Andrea Cristofoli, Piotr Tourkine
The massless (or ultrarelativistic) limit of a Schwarzschild black hole with fixed energy was determined long ago in the form of the Aichelburg-Sexl shockwave, but the status of th…
Classical physics from amplitudes on curved backgrounds
Tim Adamo, Andrea Cristofoli, Anton Ilderton
We generalise the Kosower-Maybee-O'Connell (KMOC) formalism relating classical observables and scattering amplitudes to curved backgrounds. We show how to compute the final semicla…