Weak-field asymptotic theory of tunneling ionization: benchmark
Weak-field asymptotic theory of tunneling ionization: benchmark
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隧道电离的弱场渐进理论：基准
DOI：
10.1088/0953-4075/48/6/061003
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and T. Morishita
中科院分区：
文献类型：
--
作者：
V. H. Trinh;O. I. Tolstikhin;and T. Morishita
最近发展的原子和分子在外部静电场中隧道电离的多电子弱场渐近理论（Tolstikhin et al 2014, Phys. Rev. A 89, 013421）被扩展到场渐近展开的一阶项。为了强调结果，我们在这里提出一个简单的分析公式，给出双电子原子 H− 和 He 的隧道电离率。与可用于这些系统的完全相关的从头计算进行比较表明，一阶理论在广泛的领域中定量地起作用，直到越障电离的开始，因此有望在强场物理中找到大量应用。
The recently developed many-electron weak-field asymptotic theory of tunneling ionization of atoms and molecules in an external static electric field (Tolstikhin et al 2014, Phys. Rev. A 89, 013421) is extended to the first-order terms in the asymptotic expansion in field. To highlight the results, here we present a simple analytical formula giving the rate of tunneling ionization of two-electron atoms H− and He. Comparison with fully-correlated ab initio calculations available for these systems shows that the first-order theory works quantitatively in a wide range of fields up to the onset of over-the-barrier ionization and hence is expected to find numerous applications in strong-field physics.