5 papers
Scattering in strong field QED in a non-null background
Patrick Copinger, James P. Edwards, Karthik Rajeev
We examine scattering amplitudes for an arbitrary number of photons in a class of non-null background electromagnetic fields, studying tree-level and one-loop amplitudes in scalar…
Integration techniques for worldline integrals
Victor M. Banda Guzman, James P. Edwards, C. Moctezuma Mata Zamora +2
The worldline formalism allows one to obtain compact integral representations combining the information of large numbers of Feynman diagrams. However, their analytic calculation le…
Low-energy multi-photon scattering at tree-level and one-loop order in a homogeneous electromagnetic field
Ivan Ahumada, Patrick Copinger, James P. Edwards
We study low energy photons coupled to scalar and spinor matter in the presence of an arbitrary homogeneous electromagnetic field in a first-quantised (worldline) approach. Utilisi…
Worldline Modeling of Ultra-Intense Lasers for N-photon Scattering Processes
Ivan Ahumada, Patrick Copinger, James P. Edwards +1
The modeling of present and future ultra-intense lasers demands techniques that go beyond the standard diagrammatic approach to non-perturbatively fully capture the effects of stro…
Pair creation, backreaction, and resummation in strong fields
Patrick Copinger, James P. Edwards, Anton Ilderton +1
We revisit particle creation in strong fields, and backreaction on those fields, from an amplitudes perspective. We describe the strong field by an initial coherent state of photon…