Electron-positron pair production in the presence of strong and oscillating electromagnetic fields

在强振荡电磁场存在下产生正负电子对

• 批准号: 388776593
• 负责人: Privatdozent Dr. Günter Plunien
• 金额: --
• 依托单位: Department of Statistical Physics
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2020-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/388776593?language=en
• 关键词: Electron; positron; pair; production; presence

This project aims at the theoretical study of the electron-positron pair-creation process in strong laser fields varying in space and time. The pair-production probabilities will be calculated for the case of two counter-propagating laser beams beyond the dipole approximation and beyond the standing-wave approximation by means of a nonperturbative numerical technique. In particular, the pulse shape effects on observable quantities and characteristics of the pair-production process will be examined. Besides, we will study the scenario of a strong but slowly varying electric field superimposed by a weak but fast pulse (dynamically assistant Schwinger effect). Taking into account the spatial dependence of the external fields within these problems and the analysis of various pulse shapes will allow to find the most favorable configurations needed for the experimental observation of the Schwinger effect.

本项目旨在对强激光场中随时间和空间变化的电子-正电子对产生过程进行理论研究。本文用非微扰的数值方法计算了两束反向传播的激光束在偶极近似和驻波近似下的成对产生几率。特别是，脉冲形状对可观察到的数量和特性的对生产过程的影响将被检查。此外，我们将研究一个强但缓慢变化的电场叠加一个弱但快速的脉冲（动力学辅助Schwinger效应）的情况。考虑到这些问题中的外部场的空间依赖性和各种脉冲形状的分析，将允许找到最有利的配置所需的实验观察的施温格效应。

项目成果

Locally-constant field approximation in studies of electron-positron pair production in strong external fields

• DOI: 10.1103/physrevd.99.016020
• 发表时间: 2018-11
• 期刊: Physical Review D
• 影响因子: 5
• 作者: I. Aleksandrov;G. Plunien;V. Shabaev

Dynamically assisted Schwinger effect beyond the spatially-uniform-field approximation

• DOI: 10.1103/physrevd.97.116001
• 发表时间: 2018-05
• 期刊: Physical Review D
• 影响因子: 5
• 作者: I. Aleksandrov;G. Plunien;V. Shabaev

Momentum distribution of particles created in space-time-dependent colliding laser pulses

• DOI: 10.1103/physrevd.96.076006
• 发表时间: 2017-09
• 期刊: Physical Review D
• 影响因子: 5
• 作者: I. Aleksandrov;G. Plunien;V. Shabaev

Photon emission in strong fields beyond the locally-constant field approximation

• DOI: 10.1103/physrevd.100.116003
• 发表时间: 2019-09
• 期刊: Physical Review D
• 影响因子: 5
• 作者: I. Aleksandrov;G. Plunien;V. Shabaev