论文标题
通过在粒子中粒子中的QUD-table对QED表的sigmoid采样来提高硬光子发射的准确性
Improving the accuracy of hard photon emission by Sigmoid sampling of the QED-table in particle-in-cell-Monte-Carlo simulations
论文作者
论文摘要
粒子中的粒子和蒙特卡罗模拟（PIC-MC）对量子 - 电动力（QED）方案中激光 - 血压相互作用的研究已大大提出。尽管这些模拟被广泛使用，但我们发现由于不适当的实现了硬光子发射的量子过程，并且在PIC-MC代码中产生了量子过程，因此出现了明显的数值误差。该误差源于用于采样光子能量的QED表的低分辨率，该光子能量是在对数尺度上产生的，无法解析高能量光子。我们通过Sigmoid函数提出了一种新的采样方法，该方法可以处理光子发射光谱的低能和高能端。它保证了在强场QED方案中，PIC-MC算法对于硬光子辐射和其他相关过程的准确性。
Research on laser-plasma interaction in the quantum-electrodynamic (QED) regime has been greatly advanced by particle-in-cell & Monte-Carlo simulations (PIC-MC). While these simulations are widely used, we find that noticeable numerical error arises due to inappropriate implementation of the quantum process accounting for hard photon emission and pair production in the PIC-MC codes. The error stems from the low resolution of the QED table used to sample photon energy, which is generated in the logarithmic scale and cannot resolve high energy photons. We propose a new sampling method via Sigmoid function that handles both the low energy and high energy end of the photon emission spectrum. It guarantees the accuracy of PIC-MC algorithms for hard photon radiation and other related processes in the strong-field QED regime.
