Speaker
Rafael Aoude
(University of Edinburgh)
Description
In this talk, I will present an approach to computing Hawking radiation that is based on on-shell scattering amplitudes. The Hawking spectrum is obtained by exponentiating a series of Feynman diagrams describing the scattering of a massless scalar field through a collapsing background. Using semiclassical methods, we derive a generalisation of an amplitude closely related to the Bogoliubov coefficients. This relates pair production to one-to-one scattering on a background via crossing.
Finally, I will replace the background with a coherent-state description of the collapse process and describe it with a purely flat-space approach.
Author
Rafael Aoude
(University of Edinburgh)