6 papers
Scattered wave functions and worldline instantons for particle production in curved spacetime
Philip Semrén, Greger Torgrimsson
We study the production of spin- particle-antiparticle pairs in curved spacetimes with nontrivial dependence on more than one coordinate. To this end, we develop two complemen…
Solving the Dirac equation on a GPU for strong-field processes in multidimensional background fields
Greger Torgrimsson
In this paper, we show how to solve the Dirac equation, $(iγ^μ[\partial_μ+ieA_μ(t,{\bf x})]-m)Ï=0$, on a GPU. This is orders of magnitude faster than solving it on CPU and all…
Momentum correlation in pair production by spacetime dependent fields from scattered wave functions
Greger Torgrimsson
We consider Sauter-Schwinger pair production by electric fields that depend on both time and space, and . For space-independent fields, , momentum conserva…
Nonlinear trident using WKB and worldline instantons
Gianluca Degli Esposti, Greger Torgrimsson
We consider nonlinear trident, , in various electric background fields. This…
Schwinger pair production in spacetime fields: Moiré patterns, Aharonov-Bohm phases and Sturm-Liouville eigenvalues
Gianluca Degli Esposti, Greger Torgrimsson
We use a worldline-instanton formalism to study the momentum spectrum of Schwinger pair production in spacetime fields with multiple stationary points. We show that the interferenc…
Worldline instantons for nonperturbative particle production by space and time dependent gravitational fields
Philip Semrén, Greger Torgrimsson
We develop a worldline-instanton approach for calculating the momentum spectrum of particles produced by gravitational fields which depend on both space and time. The instantons ar…