e-p等离子体中超强激光脉冲的分裂及类多孤子结构的形成  

PULSE SPLITTING AND MULTI-SOLITONS-LIKE STRUCTURE FORMATION OF ULTRA-INTENSE LASER PULSE IN ELECTRON-POSITRON PLASMAS

作　　者：胡强林[1] 余晓光[1] 

机构地区：[1]井冈山大学数理学院,江西吉安343009

出　　处：《井冈山大学学报（自然科学版）》2013年第5期13-18,共6页Journal of Jinggangshan University (Natural Science)

基　　金：国家自然科学基金项目(11064005);江西省自然科学基金项目(2010GQW0030);江西省原子与分子重点学科(2011-2015)项目

摘　　要：通过推导并数值求解超强线极化脉冲激光在正负电子对(e-p)等离子体中传播时所满足的非线性Schrdinger方程,讨论了超强线极化脉冲激光在e-p等离子体中的传播特性。结果表明,传播过程中真空极化和磁化产生的非线性效应与群速度色散之间的竞争能导致高斯型脉冲激光的自压缩,对长脉冲,这种竞争能使脉冲在压缩后又会产生分裂,最终导致类多孤子结构的形成。The propagation characteristic of a linearly polarized ultra-intense laser pulse propagating in electron-positron plasmas are investigated by solving the modified nonlinear SchrSdinger equation numerically. The results show that the competition of the vacuum polarization and magnetization nonlinearity and group velocity dispersion can result in the compression of an initially Gaussian laser pulse. For long pulse, the competition can split the pulse, and lead to the formation of a relatively stable multi-solitons-like structure.

关 键 词：真空极化和磁化 正负电子对(e-p)等离子体 超强脉冲激光 

分 类 号：O539[理学—等离子体物理]