强激光与粒子束2011，Vol.23Issue(1)：217-220,4.DOI:10.3788/HP1PB20112301.0217
强激光场中真空极化效应
Vacuum polarization effect in intense laser fields
摘要
Abstract
The probability of the electron-positron pair creation in vacuum by a time-dependent solution-like electric field is calculated. It has been found that, in order to have prominent pair production, the electric field intensity should be higher than the Schwinger threshold and the pulse duration should be longer than a threshold. The former condition guarantees that the electron in the negative energy state could gain enough energy to transit into a positive-energy state in Compton time. The latter condition is related to momentum requirement for the transition.关键词
真空极化/强激光场/正负电子对/狄拉克模型/Schwinger机制Key words
vacuum polarization/ strong laser field/ electron-positron pair/ Dirac model/ Schwinger mechanism分类
数理科学引用本文复制引用
任娜,王加祥,李安康,李桂波..强激光场中真空极化效应[J].强激光与粒子束,2011,23(1):217-220,4.基金项目
上海市曙光人才计划项目(06sg27) （06sg27）
上海市浦江人才计划项目(07pj14036) （07pj14036）
国家自然科学基金项目(10974056) （10974056）
