Optimization of Schwinger pair production in colliding laser pulses
F. Hebenstreit (Institut für Theoretische Physik, Universität Heidelberg, Heidelberg, 69120, Germany, Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, Bern University, Bern, 3012, Switzerland); F. Fillion-Gourdeau (Université du Québec, INRS–Énergie, Matériaux et Télécommunications, Varennes, Québec, J3X 1S2, Canada)
Recent studies of Schwinger pair production have demonstrated that the asymptotic particle spectrum is extremely sensitive to the applied field profile. We extend the idea of the dynamically assisted Schwinger effect from single pulse profiles to more realistic field configurations to be generated in an all-optical experiment searching for pair creation. We use the quantum kinetic approach to study the particle production and employ a multi-start method, combined with optimal control theory, to determine a set of parameters for which the particle yield in the forward direction in momentum space is maximized. We argue that this strategy can be used to enhance the signal of pair production on a given detector in an experimental setup.
