随着激光技术的快速发展，实验室中所能获得的电磁场强度得到了极大的提高，使得强外场下真空衰变产生正反粒子对问题再次成为研究热点。本项目主要运用量子动理学方法研究复杂强外场下的真空粒子对产生问题。量子动理学方法不仅可以计算出产生粒子对的数密度，给出产生粒子的相空间信息，还可以处理任意复杂场下的粒子对产生问题，深入研究粒子对产生的物理机制。本项目的具体研究内容为：探究粒子对产生中不同增强机制的最佳组合形式并获得最优粒子对产量；研究两个具有不同旋转形式的空间均匀圆极化电场下产生的粒子对的动量分布特征；考虑含时电场的空间不均匀性和磁场对粒子的动量分布和数密度的影响。本项目的研究结果不但可以加深人们对粒子对产生过程的理解，而且可以为实验上用激光设施验证纯光直接转化为物质的过程提供理论指导。

With the rapid development of laser technology, the maximum electromagnetic field intensity in the laboratory has been improved greatly, thereby vacuum decaying into particle-antiparticle pairs in strong external fields becomes a research hotspot again. This project mainly investigates vacuum pair production in complex and strong external fields by quantum kinetic method. Quantum kinetic method can not only be used to calculate the number density of created pairs and show the phase space information, but also be used to study pair creation in arbitrarily complex fields and investigate the physics mechanism of pair production. The research contents of this project are as follows: exploring the best combination of different enhancement mechanisms of pair creation to get the optimal pair yields; studying the signatures of particle momentum distribution in two spatially homogeneous and circularly polarized electric fields with different rotation styles; considering the effects of the spatial homogeneous of time-dependent electric field and the magnetic field on the momentum distribution and number density of created pairs. The research results of this project will not only deepen the understanding of pair creation process, but also provide the theoretical guidance for using laser to prove that light can be directly changed into matter.