Momentum Spectra for Dynamically Assisted Schwinger Pair Production

TL;DR

This paper investigates how combining laser pulses with different time scales enhances electron-positron pair production from vacuum, providing detailed momentum spectra and confirming the significant increase in production rates due to dynamical effects.

Contribution

It offers a quantum kinetic theory analysis of the dynamically assisted Schwinger mechanism, including detailed momentum spectra of produced pairs, which was not previously explored.

Findings

Enhanced pair production rate confirmed

Momentum spectra of positrons characterized

Dynamical effects significantly boost production

Abstract

Recently the dynamically assisted Schwinger mechanism, i.e., electron-positron pair production from vacuum by a combination of laser pulses with different time scales has been proposed. The corresponding results, which suggest that the rate of produced pairs is significantly enhanced by dynamical effects, are verified. Employing the framework of quantum kinetic theory intrinsically enables us to additionally provide momentum space information on the generated positron spectrum.