Dynamical view of pair creation in uniform electric and magnetic fields

TL;DR

This paper investigates the time evolution of particle pair creation in uniform electric and magnetic fields, highlighting how magnetic fields influence the dynamics, with implications for heavy-ion collision initial states.

Contribution

It introduces a detailed analysis of the time-dependent pair creation process including magnetic fields and back reaction effects, extending previous static or simplified models.

Findings

Magnetic fields accelerate the evolution of fermion systems.

Back reaction effects are incorporated into the dynamical model.

The study provides insights relevant to the initial stages of heavy-ion collisions.

Abstract

Pair creation in a uniform classical electromagnetic field (Schwinger mechanism) is studied focusing on the time evolution of the distribution of created particles. The time evolution of the distribution in time-dependent fields is also presented as well as effects of back reaction. Motivated by the Glasma flux tube, which may be formed at the initial stage of heavy-ion collisions, we investigate effects of a magnetic field parallel to an electric field, and find that the magnetic field makes the evolution of a fermion system faster.