Phase control of Schwinger pair production by colliding laser pulses

TL;DR

This paper investigates how the phase shift between two colliding laser pulses affects the creation of electron-positron pairs, revealing sensitive dependence on phase and polarization that can be explained through invariant field structures.

Contribution

It provides a detailed analysis of phase and polarization effects on Schwinger pair production in colliding laser pulses, highlighting the role of invariant field structures.

Findings

Pair production distribution is highly sensitive to phase shift and polarization.

The dependence can be explained by invariant field structure analysis.

The study offers insights into controlling pair production via laser pulse parameters.

Abstract

We study the Schwinger electron-positron pair production by a strong electromagnetic field of two colliding e-polarized laser pulses with a relative phase shift $\Psi$. The spatio-temporal distribution of created pairs is very sensitive to this phase shift and to polarization of the pulses. We study this dependence in detail and demonstrate how it can be explained in terms of the underlying invariant field structure of the counterpropagating focused pulses.