Interference Effects in Bethe-Heitler Pair Creation in a Bichromatic Laser Field

TL;DR

This paper investigates how quantum interference in a bichromatic laser field influences electron-positron pair creation rates and angular distributions, revealing ways to optimize pair production through phase control.

Contribution

It demonstrates the impact of quantum interference effects on pair creation in a two-color laser field and identifies phase conditions that maximize production.

Findings

Interference affects angular distributions of created pairs.

Total pair-production rates are modulated by laser phase.

Optimal phase settings enhance pair creation yield.

Abstract

We study the creation of electron-positron pairs in the superposition of a nuclear Coulomb field and a two-color laser field of high intensity. Our focus lies on quantum interference effects, which may arise if the two laser frequencies are commensurable. We show that the interference manifests in the angular distributions of the created particles, which are discussed in the nuclear rest frame and the laboratory frame. Additionally, we demonstrate that the total pair-production rates can be affected by interference and identify the relative phase between the two laser modes, which optimizes the pair-production yield.