17 citations · 32 across the 9 of their papers we have counts for
9 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…
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…
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…
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…
All-multiplicity amplitudes in impulsive PP-waves from the worldline formalism
Patrick Copinger, James P. Edwards, Anton Ilderton +1
We use the worldline formalism to derive Bern-Kosower type Master Formulae for the tree-level scattering of a charged particle and an arbitrary number of photons on impulsive PP-wa…
Master Formulae for -photon tree level amplitudes in plane wave backgrounds
Patrick Copinger, James P. Edwards, Anton Ilderton +1
The presence of strong electromagnetic fields adds huge complexity to QED Feynman diagrams, such that new methods are required to calculate higher-loop and higher-multiplicity scat…
Monte Carlo generation of localised particle trajectories
Ivan Ahumada, James P. Edwards
We introduce modifications to Monte Carlo simulations of the Feynman path integral that improve sampling of localised interactions. The new algorithms generate trajectories in simp…
Strong-field vacuum polarisation with high energy lasers
A. J. Macleod, J. P. Edwards, T. Heinzl +2
When photons propagate in vacuum they may fluctuate into matter pairs thus allowing the vacuum to be polarised. This linear effect leads to charge screening and renormalisation. Wh…