论文标题
磁场效应在非顺序双电离表现中的特征，作为分子的后散射与原子的前向散射
Signatures of magnetic field effects in non-sequential double ionization manifesting as back-scattering for molecules versus forward-scattering for atoms
论文作者
论文摘要
对于两电子双原子分子，我们研究了回忆的非顺序双电离中的磁场效应。我们通过制定三维半古典模型来做到这一点，该模型充分说明了库仑奇异性和时间传播期间的磁场效应。使用此模型，我们确定了非偶极效应的突出特征。也就是说，我们证明了沿着光传播方向的回忆电子后筛。因此，该电子与由于磁场引起的动量变化方向相反。这与强驱动的原子形成鲜明对比，在强驱动的原子中，回忆的电子向前散射沿光传播的方向。我们将这些独特的特征归因于磁场与分子中的软回忆共同创建的不同门，与原子中的硬回忆相比。这两个不同的大门在回忆之前不久引起，沿着光传播的方向，回忆的不同动量和回忆的位置。结果，我们表明，库仑的力是在分子中的回忆电子的后筛分，并沿着光传播方向在原子中进行前向散列。
For two-electron diatomic molecules, we investigate magnetic field effects in non-sequential double ionization where recollisions prevail. We do so by formulating a three-dimensional semi-classical model that fully accounts for the Coulomb singularities and for magnetic field effects during time propagation. Using this model, we identify a prominent signature of non-dipole effects. Namely, we demonstrate that the recolliding electron back-scatters along the direction of light propagation. Hence, this electron escapes opposite to the direction of change in momentum due to the magnetic field. This is in striking contrast to strongly-driven atoms where the recolliding electron forward-scatters along the direction of light propagation. We attribute these distinct signatures to the different gate that the magnetic field creates jointly with a soft recollision in molecules compared to a hard recollision in atoms. These two different gates give rise, shortly before recollision, to different momenta and positions of the recolliding electron along the direction of light propagation. As a result, we show that the Coulomb forces from the nuclei act to back-scatter the recolliding electron in molecules and forward-scatter it in atoms along the direction of light propagation.
