Pairwise mode entanglement in Schwinger production of particle-antiparticle pairs in an electric field

TL;DR

This paper investigates how Schwinger pair production in electric fields generates and alters quantum entanglement between particle modes, revealing insights beyond particle count statistics.

Contribution

It introduces a detailed analysis of mode entanglement in Schwinger pair production, considering both constant and pulsed electric fields, highlighting quantum correlations beyond particle numbers.

Findings

Mode entanglement varies with electric field strength.

Entanglement provides additional information beyond particle distributions.

Pulsed fields influence entanglement dynamics.

Abstract

Quantum entanglement is the characteristic quantum correlation. Here we use this concept to analyze the quantum entanglement generated by Schwinger production of particle-antiparticle pairs in an electric field, as well as the change of mode entanglement as a consequence of the electric field effect on an entangled pair of particles. The system is partitioned by using momentum modes. Various kinds of pairwise mode entanglement are calculated as functions of the electric field. Both constant and pulsed electric fields are considered. The use of entanglement exposes information beyond that in particle number distributions.