论文标题
在脉冲平面波中产生完全极化的非线性breit轮毂对
Fully polarized nonlinear Breit-Wheeler pair production in pulsed plane waves
论文作者
论文摘要
在脉冲波波背景中研究了来自极化种子光子光束的完全极化的非线性BREIT轮胎对生产。用密度矩阵理论全面地描述了粒子（电子和正电子）自旋和光子极化。根据种子光子束的初始极化，在线性和圆形极化激光背景中得出并讨论了产生的颗粒的紧凑表达和自旋极化。数值结果表明，通过将光子极化到激光极化以及从圆形极化种子光子束的高度极化正电子光束产生的光子偏振和产生。局部单色近似和局部恒定场近似是通过完整的量子电动力计算得出的。
Fully polarized nonlinear Breit-Wheeler pair production from a beam of polarized seed photons is investigated in pulsed plane-wave backgrounds. The particle (electron and positron) spin and photon polarization are comprehensively described with the theory of the density matrix. The compact expressions for the energy spectrum and spin polarization of the produced particles, depending on the initial polarization of the seed photon beam, are derived and discussed in both linearly and circularly polarized laser backgrounds. The numerical results suggest an appreciable improvement of the positron yield by orthogonalizing the photon polarization to the laser polarization, and the generation of a highly polarized positron beam from a beam of circularly polarized seed photons. The locally monochromatic approximation and the locally constant field approximation are derived and benchmarked with the full quantum electrodynamic calculations.
