We simulated the multielectron dynamics of a CO molecule irradiated by near-IR λ = 760 nm two-cycle pulses with different carrier envelope phases by using the multiconfiguration time-dependent (TD) Hartree–Fock (MCTDHF) method. The ionization rate estimated from the simulations is higher when the laser electric field ɛ ( t ) points from C to O than in the opposite case, in agreement with the results of two-color experiments. The mechanism of the directional anisotropy in tunnel ionization of CO was examined by converting the obtained multielectron dynamics to the representation in terms of TD natural orbitals { ϕ j ( t )}. Within the framework of MCTDHF, we derived the equations of motion for { ϕ j ( t )}. From the derived equations, we defined the TD effective potentials ##IMG## [http://ej.iop.org/images/0953-4075/53/18/184...] {${v}_{j}^{\mathrm{e}\mathrm{ff}}\left(t\right)$}

中文翻译：

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通过自然轨道随时间的有效势分析强激光诱导的CO电离中的多电子动力学

我们通过使用多配置时变（TD）哈特里·福克（MCTDHF）方法，模拟了具有不同载流子包络相的近红外λ= 760 nm两周期脉冲照射的CO分子的多电子动力学。与双色实验的结果一致，当激光电场ɛ（t）从C指向O时，从模拟中估计的电离率要高于在相反情况下的电离率。通过将获得的多电子动力学转换为以TD自然轨道{ϕ j（t）}表示的形式，研究了CO隧道电离中方向各向异性的机理。在MCTDHF的框架内，我们导出了{ϕ j（t）}的运动方程。从导出的方程式中，我们定义了TD有效电位## IMG ## [http：//ej.iop.org/images/0953-4075/53/18/184 ...