发表机构
Malaviya National Institute of Technology Jaipur（马拉维娅国家理工学院斋浦尔分校）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究在Dirac-Heisenberg-Wigner框架下，探讨超高斯脉冲形状、啁啾及相对相位对空间非均匀电场中动力学辅助对产生的影响，发现啁啾显著增强产额，相对相位提供额外调控手段。
AI 中文摘要
我们在(1+1)维Dirac-Heisenberg-Wigner形式框架内，研究了超高斯脉冲形状对含频率啁啾的空间非均匀电场中动力学辅助对产生的影响。通过改变啁啾参数、超高斯脉冲形状以及外场的空间尺度，对单色场和动力学辅助的双色组合场进行了分析。我们的结果以约化动量分布和总粒子产额的形式呈现，揭示了脉冲整形、空间非均匀性、频率啁啾和动力学辅助之间的相互作用可以显著改变对产生动力学。特别地，啁啾显著增强了绝对对产生产额并重塑了动量谱，其中弱分量的啁啾特别有效，而两个分量同时啁啾则产生最大的产额。超高斯阶数对强场产生的影响相对适中，而增加脉冲的平顶特性会增强弱场和动力学辅助区域中的谱结构和动量重新分布，尤其是在啁啾条件下。最后，我们展示了两个场分量之间的相对相位提供了额外的控制参数，其影响在更大的空间尺度下变得更加显著，导致动量空间结构发生重大变化。总的来说，我们的结果为在规定的场参数范围内，对空间和时间相关电场中的动力学辅助对产生进行最优控制提供了有用的参考。
英文摘要
We investigate the effects of super-Gaussian pulse shapes on dynamically assisted pair production in spatially inhomogeneous electric fields with frequency chirping within the framework of the (1+1)-dimensional Dirac-Heisenberg-Wigner formalism. The analysis is carried out for both single-color fields and dynamically assisted two-color combined fields by varying the chirp parameter, super-Gaussian pulse shape, and the spatial scale of the external field. Our results are presented in terms of the reduced momentum distribution and the total particle yield, revealing that the interplay between pulse shaping, spatial inhomogeneity, frequency chirping, and dynamical assistance can significantly modify the pair-production dynamics. In particular, chirping substantially enhances the absolute pair-production yield and reshapes the momentum spectrum, with chirping of the weak component being particularly effective, while simultaneous chirping of both components produces the largest yields. The super-Gaussian order has a relatively modest influence on strong-field production, while increasing the flat-top character of the pulse enhances spectral structures and momentum redistribution in the weak and dynamically assisted regimes, particularly under chirping. Finally, we show that the relative phase between the two field components provides an additional control parameter, with its influence becoming more pronounced for larger spatial scales leading to significant changes in the momentum-space structure. Overall, our results provide a useful reference for optimal control of dynamically assisted pair production in space- and time-dependent electric fields within a prescribed range of field parameters.
Comments20 pages, 13 figures
