8 citations · 14 across the 10 of their papers we have counts for
10 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…
The ABCs of Amplitudes, Bogoliubov and Crossing
Rafael Aoude, Asaad Elkhidir, Anton Ilderton +2
It is now common to describe classical backgrounds involving dynamical black holes with the production of gravitational radiation using the methods of scattering amplitudes. In tha…
Entanglement scaling and dynamics in the Sauter-Schwinger effect
S. Mahesh Chandran, Karthik Rajeev
In quantum field theory, entanglement entropy under spatial bipartitioning serves as a powerful information-theoretic probe of quantum correlations. In this work, we present the fi…
Thermalization from quenching in coupled oscillators
M. Harinarayanan, Karthik Rajeev
We introduce a finite-time protocol that thermalizes a quantum harmonic oscillator, initially in its ground state, without requiring a macroscopic bath. The method uses a second os…
Hawking radiation from the double copy
Anton Ilderton, William Lindved, Karthik Rajeev
Gravity and gauge theory are concretely linked by the double copy. Although well-studied at the level of perturbative scattering in vacuum, far less is known about non-perturbative…
Tunnelling amplitudes and Hawking radiation from worldline QFT
Anton Ilderton, Karthik Rajeev
We compare Hawking radiation in a collapse background with Schwinger pair creation in an electric field. The comparison is driven by the presence of an analogue horizon in the Schw…
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…
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…