发表机构
Nantong University; Kuban State University; Joint-Stock Company “Center for Research and Development”; Shenzhen MSU-BIT University（南通大学; 库班国立大学; 联合股份公司“研发研究中心”; 深圳北理莫斯科大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用物理信息神经网络验证光前参考积分器，研究CEP稳定少周期脉冲中电子自旋动力学，发现净旋转角为零，峰值角度随CEP变化，并推广至椭圆极化，为强场自旋动力学提供验证工具。
AI 中文摘要
载波包络相位（CEP）稳定的少周期脉冲使亚周期场结构成为激光驱动极化电子源的控制参数，然而针对此类脉冲的自旋求解器很少与精确结果进行对比验证。我们证明，对于在线性极化平面波脉冲中初始静止的电子，静止系中的极化角遵循瞬时矢势，Σ = 2arctan(a_x/2) + a_e a_x，其中a_e为电子反常磁矩：净旋转角对每个CEP均为零，而脉冲内峰值角度随CEP变化，对于双周期脉冲为3.02度，对于八周期脉冲为0.22度。该结果源自纵向和横向快度中的Volkov轨道。我们利用该结果验证了一个光前参考积分器和一个仅基于光前方程训练的物理信息神经网络，该网络在自旋部分达到4×10^{-5}的精度，并可推广至椭圆极化情形，而椭圆极化尚无已知的闭式解。这为强场中CEP分辨的自旋动力学提供了经过验证的工具。
英文摘要
Carrier-envelope-phase (CEP) stabilized few-cycle pulses make the sub-cycle field structure a control parameter for laser-driven polarized electron sources, yet spin solvers for such pulses are rarely tested against exact results. We show that for an electron initially at rest in a linearly polarized plane-wave pulse the rest-frame polarization angle follows the instantaneous vector potential, $Σ= 2\arctan(a_x/2) + a_e a_x$ with $a_e$ the electron anomaly: the net rotation vanishes for every CEP, while the peak intra-pulse angle varies over the CEP by 3.02 degrees for a two-cycle and by 0.22 degrees for an eight-cycle pulse. The result follows from the Volkov orbit in longitudinal and transverse rapidities. We use it to validate a light-front reference integrator and a physics-informed neural network trained only on the light-front equations, which reaches $4\times10^{-5}$ in the spin sector and carries over to elliptical polarization, for which no closed-form solution is known. This gives validated tools for CEP-resolved spin dynamics in intense fields.
Comments14 pages, 3 figures; Letter followed by Supplemental Material. Submitted to Physical Review A. Code and data: https://doi.org/10.5281/zenodo.22791526
