Electron-positron pair production in frequency modulated laser fields

被引：26

作者：

Gong, C. ^{[1
]}

Li, Z. L. ^{[1
,2
]}

Xie, B. S. ^{[3
,4
,5
]}

Li, Y. J. ^{[1
]}

机构：

[1] China Univ Min & Technol, State Key Lab GeoMech & Deep Underground Engn, Beijing 100083, Peoples R China

[2] China Univ Min & Technol, Sch Sci, Beijing 100083, Peoples R China

[3] Beijing Normal Univ, Minist Educ, Key Lab Beam Technol, Beijing 100875, Peoples R China

[4] Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China

[5] Beijing Radiat Ctr, Beijing 100875, Peoples R China

来源：

PHYSICAL REVIEW D | 2020年 / 101卷 / 01期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

VACUUM;

D O I：

10.1103/PhysRevD.101.016008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The momentum spectrum and the number density of created electron-positron pairs in a frequency modulated laser field are investigated using the quantum kinetic equation. It is found that the momentum spectrum presents an obvious interference pattern. This is an imprint of the frequency modulated field on the momentum spectrum, because the momentum peaks correspond to the pair production process by absorbing different frequency component photons. Moreover, the interference effect can also be understood qualitatively by analyzing turning-point structures. The study of the pair number density shows that the number density is very sensitive to modulation parameters and can be enhanced by 2 or 3 orders of magnitude for certain modulation parameters, which may provide a new way to increase the number of created electron-positron pairs in future experiments.

引用

页数：9

共 38 条

[1] Enhanced electron-positron pair production by frequency chirping in one- and two-color laser pulse fields [J].