From local to nonlocal: higher fidelity simulations of photon emission in intense laser pulses

Abstract

State-of-the-art numerical simulations of quantum electrodynamical (QED) processes in strong laser fields rely on a semiclassical combination of classical equations of motion and QED rates, which are calculated in the locally constant field approximation. However, the latter approximation is unreliable if the amplitude of the fields, $a_0$, is comparable to unity. Furthermore, it cannot, by definition, capture interference effects that give rise to harmonic structure. Here we present an alternative numerical approach, which resolves these two issues by combining cycle-averaged equations of motion and QED rates calculated in the locally monochromatic approximation. We demonstrate that it significantly improves the accuracy of simulations of photon emission across the full range of photon energies and laser intensities, in plane-wave, chirped and focused background fields.

39 pages, 8 figures; added discussion, to appear in NJP

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• Nonlinear Compton scattering in ultra-short laser pulses
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• Conceptual Design Report for the LUXE Experiment
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• A uniform locally constant field approximation for photon-seeded pair production
• First-order strong-field QED processes in a tightly focused laser beam
• From local to nonlocal: higher fidelity simulations of photon emission in intense laser pulses
• Classical and quantum particle dynamics in univariate background fields
• Optimizing Laser Pulses for Narrowband Inverse Compton Sources in the High-Intensity Regime
• Pulse envelope effect on nonlinear Compton scattering in electron-laser collisions
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Cited by in corpus (11)

• Charged particle motion and radiation in strong electromagnetic fields
• Conceptual Design Report for the LUXE Experiment
• Loops and polarization in strong-field QED
• From local to nonlocal: higher fidelity simulations of photon emission in intense laser pulses
• LUXE-NPOD: new physics searches with an optical dump at LUXE
• Higher fidelity simulations of nonlinear Breit-Wheeler pair creation in intense laser pulses
• Pulse envelope effects in nonlinear Breit-Wheeler pair-creation
• Vortex $\gamma$ photon generation via spin-to-orbital angular momentum transfer in nonlinear Compton scattering
• High-resolution modeling of nonlinear Compton scattering in focused laser pulses
• Locally monochromatic two-step nonlinear trident process in a plane wave
• Studying quantum algorithms for particle track reconstruction in the LUXE experiment