强场双电离：“膝盖”下是什么？
Strong field double ionization: What is under the "knee"?
摘要：
在强激光脉冲中，氦原子的双电离过程既有非相关的（“序列”）过程，也有相关的（“非序列”）过程。双电离概率具有作为脉冲强度的函数的特征“膝”形。我们调查这个系统的相空间动力学，特别是通过寻找调节电离过程的动力学结构。新出现的图像通过澄清电子和核心电子所扮演的不同角色来补充电子化的场景。我们的分析得出了对电离定性变化发生的强度的可验证的预测，从而导致了标志性的“膝盖”形状。
英文摘要：
Both uncorrelated ("sequential") and correlated ("nonsequential") processes contribute to the double ionization of the helium atom in strong laser pulses. The double ionization probability has a characteristic "knee" shape as a function of the intensity of the pulse. We investigate the phase-space dynamics of this system, specifically by finding the dynamical structures that regulate the ionization processes. The emerging picture complements the recollision scenario by clarifying the distinct roles played by the recolliding and core electrons. Our analysis leads to verifiable predictions of the intensities where qualitiative changes in ionization occur, leading to the hallmark "knee" shape.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
