Electron-positron pair production in spatially inhomogeneous electric fields with quadratically symmetric chirp

TL;DR

This study investigates electron-positron pair production in spatially inhomogeneous electric fields with quadratically symmetric chirp, revealing enhanced particle creation and distinct spectral features compared to asymmetric chirped fields.

Contribution

It introduces analysis of pair production in quadratically symmetric chirped fields, highlighting differences from asymmetric fields and quantifying increased particle yields.

Findings

Stronger oscillations and higher peaks in momentum spectrum under symmetric chirp.

Total particle number increases with chirp, nearly doubling compared to asymmetric chirp.

Widening of the spectrum observed only in high-frequency fields.

Abstract

Electron-positron pair production from vacuum in spatially inhomogeneous electric fields with quadratically symmetric chirp is studied within the real-time Dirac-Heisenberg-Wigner formalism. The reduced momentum spectrum and the reduced total number of the created particles under the quadratically symmetric chirped electric field are investigated in high- and low-frequency fields. Compared with that of the quadratically asymmetric chirped field in particular, it is found that the momentum spectrum under the quadratically symmetric chirped field exhibits the stronger oscillations and the higher peaks in both high- and low- frequency fields, and it shows an obvious widening only in the high-frequency field. It is also found that the total number of the created particles of the quadratically symmetric chirped field increases with the chirp, and it is nearly twice that of the quadratically asymmetric chirped field.