标题： 激光生成的电子-正电子对的高能再碰撞过程 显示英文标题

标题： High-Energy Recollision Processes of Laser-Generated Electron-Positron Pairs

摘要： 在微观时空区域内产生的两个带相反电荷的粒子可以被分离，在更长的距离上被加速，并通过激光场重新碰撞。 因此，新的反应变得可行，其中粒子吸收的能量可以高效释放。 通过研究激光修饰的极化算符，我们发现了一种新的贡献，该贡献描述了由纯光产生的电子-正电子对在伽马光子撞击强线性偏振激光脉冲时经历的高能重新碰撞。 在宏观激光波长范围内，重新碰撞过程中吸收的能量对应于大量激光光子，可用于引发高能反应。 因此，极化算符中的重新碰撞贡献在定性和定量上都与众所周知的描述电子-正电子对在微观形成区域内湮灭的贡献有所不同。 显示英文摘要

摘要： Two oppositely charged particles created within a microscopic space-time region can be separated, accelerated over a much larger distance, and brought to a recollision by a laser field. Consequently, new reactions become feasible, where the energy absorbed by the particles is efficiently released. By investigating the laser-dressed polarization operator, we identify a new contribution describing high-energy recollisions experienced by an electron-positron pair generated by pure light when a gamma photon impinges on an intense, linearly polarized laser pulse. The energy absorbed in the recollision process over the macroscopic laser wavelength corresponds to a large number of laser photons and can be exploited to prime high-energy reactions. Thus, the recollision contribution to the polarization operator differs qualitatively and quantitatively from the well-known one, describing the annihilation of an electron-positron pair within the microscopic formation region.