Enhancement of electron-positron pairs in combined potential wells with linear chirp frequency

TL;DR

This study investigates how linear chirp frequency modulation in combined potential wells can significantly enhance electron-positron pair production from vacuum, with results showing increased pair creation at low frequencies and suppression at high frequencies.

Contribution

It demonstrates the impact of linear chirp frequency modulation on pair production, revealing conditions that enhance or suppress electron-positron pairs compared to fixed frequency scenarios.

Findings

Frequency modulation enhances electron number at low frequencies.

High frequency oscillations with modulation suppress pair creation.

Contours of electron number depend on frequency and modulation parameters.

Abstract

The effect of linear chirp frequency on the process of electron-positron pairs production from vacuum in the combined potential wells is investigated by computational quantum field theory. Numerical results of electron number and energy spectrum under different frequency modulation parameters are obtained. By comparing with the fixed frequency, it is found that frequency modulation has a significant enhancement effect on the number of electrons. Especially when the frequency is small, appropriate frequency modulation enhances multiphoton processes in pair creation, thus promoting the pair creation. However, the number of electrons created by high frequency oscillating combined potential wells decreases after frequency modulation due to the phenomenon of high frequency suppression. The contours of the number of electrons varying with frequency and frequency modulation parameters are given, which may provide theoretical reference for possible experiments.