Interferences effects in the polarized nonlinear Breit-Wheeler process

被引：3

作者：

Jiang, Jing-Jing ^{[1
]}

Dai, Ya-Nan ^{[1
]}

Zhuang, Kai -Hong ^{[1
]}

Gao, Yunquan ^{[2
]}

Tang, Suo ^{[2
]}

Chen, Yue-Yue ^{[1
]}

机构：

[1] Shanghai Normal Univ, Dept Phys, Shanghai 200234, Peoples R China

[2] Ocean Univ China, Coll Phys & Optoelect Engn, Qingdao 266100, Shandong, Peoples R China

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 03期

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

PAIR PRODUCTION; FIELD;

D O I：

10.1103/PhysRevD.109.036030

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The creation of polarized electron -positron pairs by the nonlinear Breit -Wheeler process in short laser pulses is investigated using the Baier-Katkov semiclassical method beyond local -constant -field approximation (LCFA), which allows for identifying the interferences effects in the positron polarization. When the laser intensity is in the intermediate regime, the interferences of pair production in different formation lengths induce an enhancement of pair production probability for spin -down positrons, which significantly affects the polarization of created positrons. The polarization features are distinct from that obtained with LCFA, revealing the invalidity of LCFA in this regime. Meanwhile, the angular distribution for different spin states varies, resulting in an angular -dependent polarization of positrons. The average polarization of positrons at beam center is highly sensitive to the laser's carrier -envelope phase (CEP), which provides a potential alternative way of determining the CEP of strong lasers. The verification of the observed interference phenomenon is possible for the upcoming experiments.

引用

页数：10

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