论文标题
用于任意自旋和光子极化的成对生产的半经典方法的数值方法
Numerical approach to the semiclassical method of pair production for arbitrary spins and photon polarization
论文作者
论文摘要
在本文中，我们展示了如何重塑Baier，Katkov和Strakhovenko的半经典方法的成对生产结果，包括以适合数值实现的形式指定所有自旋状态和光子极化的可能性。在这种情况下，除了辐射排放过程所需的一种外，还出现了一种新型的积分。我们将所得公式与使用Volkov状态获得的短脉冲平面外部场获得的公式进行了比较。我们研究了局部恒定场近似在Desy的Slac和Luxe的Facet II的局部恒定场近似值中的适用性。最后，我们为对线性极化激光脉冲与线性极化传入的高能量光子之间的相对极化的依赖性提供了结果。我们观察到，即使在这些实验的某种中间强度方案中，对应于两个相对光子极化的一对生产率之间的差异约为$ 2 $，这是鉴于QED的真空折线。
In this paper we show how to recast the results of the semiclassical method of Baier, Katkov & Strakhovenko for pair production, including the possibility of specifying all the spin states and photon polarization, in a form that is suitable for numerical implementation. In this case, a new type of integral appears in addition to the ones required for the radiation emission process. We compare the resulting formulas with those obtained for a short pulse plane wave external field by using the Volkov state. We investigate the applicability of the local constant field approximation for the proposed upcoming experiments at FACET II at SLAC and LUXE at DESY. Finally, we provide results on the dependence of the pair production rate on the relative polarization between a linearly polarized laser pulse and a linearly polarized incoming high energy photon. We observe that even in the somewhat intermediate intensity regime of these experiments, there is roughly a factor of $2$ difference between the pair production rates corresponding to the two relative photon polarizations, which is of interest in light of the vacuum birefringence of QED.
