We present numerical simulations of the time delay in photoemission of asymmetric diatomic molecules using the technique of reconstruction of attosecond beating by interference of two-photon transitions (RABITT) by solving the time-dependent Schrödinger equation. Our results show an obvious time delay between photoelectrons emitted to the left and right and this relative time delay oscillates as the photoelectron energy changes. More interestingly, the amplitude of this oscillation increases when the asymmetry degree of diatomic molecules decreases. With the method of the selected continuum wave functions, we calculate the Wigner time delay in photoionization. The obtained stereo Wigner time delay also oscillates with photoelectron energy. This oscillation is traced back to two-center interferences and it could explain the relative time delay in the RABITT measurement. Furthermore, our results indicate that the continuum-continuum time delay in photoemission of heteronuclear molecules is asymmetric.

中文翻译：

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不对称分子光电离中的双中心干涉和立体维格纳时间延迟

我们通过求解与时间相关的薛定谔方程，使用双光子跃迁干涉重建阿秒拍频 (RABITT) 技术，对不对称双原子分子的光电发射时间延迟进行数值模拟。我们的结果显示向左和向右发射的光电子之间存在明显的时间延迟，并且这种相对时间延迟随着光电子能量的变化而振荡。更有趣的是，当双原子分子的不对称程度降低时，这种振荡的幅度会增加。使用选定的连续波函数的方法，我们计算了光电离的 Wigner 时间延迟。获得的立体 Wigner 时间延迟也随光电子能量振荡。这种振荡可以追溯到两个中心干扰，它可以解释 RABITT 测量中的相对时间延迟。此外，我们的结果表明，异核分子光发射的连续-连续时间延迟是不对称的。