Pair production by Schwinger and Breit-Wheeler processes in bi-frequent fields

Abstract

Counter-propagating and suitably polarized light (laser) beams can provide conditions for pair production. Here, we consider in more detail the following two situations: (i) In the homogeneity regions of anti-nodes of linearly polarized ultra-high intensity laser beams, the Schwinger process is dynamically assisted by a second high-frequency field, e.g. by a XFEL beam. (ii) A high-energy probe photon beam colliding with a superposition of co-propagating intense laser and XFEL beams gives rise to the laser assisted Breit-Wheeler process. Prospects of such bi-frequent field constellations with respect to the feasibility of conversion of light into matter are discussed.

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• Advances in QED with intense background fields
• Measuring the Boiling Point of the Vacuum of Quantum Electrodynamics
• Non-linear Breit-Wheeler process in short laser double-pulses
• Doubly assisted Sauter-Schwinger effect
• Afterglow of the dynamical Schwinger process: soft photons amass
• Non-perturbative signatures of non-linear Compton scattering
• Comparing two different descriptions of the I-V characteristic of graphene: theory and experiment
• Analysis of the Third Harmonic of a Vacuum Response in a Subcritical Laser Field
• Field induced phase transition in the few photon regime
• Strong-field QED in Furry-picture momentum-space formulation: Ward identities and Feynman diagrams