Dimensional scaling treatment of stability of simple diatomic molecules induced by superintense, high-frequency laser fields.
Dimensional scaling treatment of stability of simple diatomic molecules induced by superintense, high-frequency laser fields.
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DOI：
10.1063/1.3027451
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发表时间：
2008-12
期刊：
影响因子：
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通讯作者：
Qi Wei;S. Kais;D. Herschbach
中科院分区：
文献类型：
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作者：
Qi Wei;S. Kais;D. Herschbach
我们提出的结果，使用尺寸标度与高频Floquet理论来评估在超强激光场的气相简单双原子分子的稳定性。大D极限提供了一个简单的模型，捕获的主要物理问题，它施加电子本地化沿着激光场的偏振方向。这种局部化显著地降低了电离概率，并且当激光强度变得足够强时可以增强化学键合。我们发现，在大尺度极限（D-->无穷大）下计算H（2）（+），H（2）和He（2）在超强激光场中的稳定性比在D=3时简单得多，但得到的结果与从头计算的结果相似。我们还使用大维模型来预测H（2）（-）的稳定性和将“额外”电子结合到H（2）分子所需的场强。
We present results obtained using dimensional scaling with high-frequency Floquet theory to evaluate the stability of gas phase simple diatomic molecules in superintense laser fields. The large-D limit provides a simple model that captures the main physics of the problem, which imposes electron localization along the polarization direction of the laser field. This localization markedly reduces the ionization probability and can enhance chemical bonding when the laser strength becomes sufficiently strong. We find that energy and structure calculations at the large-dimensional limit (D-->infinity) for stabilities of H(2) (+), H(2), and He(2) in superintense laser fields are much simpler than at D=3, yet yield similar results to those found from demanding ab initio calculations. We also use the large-D model to predict the stability of H(2) (-) and the field strength needed to bind the "extra" electron to the H(2) molecule.