Configuration-interaction method with Hylleraas-Gaussian-type basis functions in cylindrical coordinates: Helium atom in a strong magnetic field
Configuration-interaction method with Hylleraas-Gaussian-type basis functions in cylindrical coordinates: Helium atom in a strong magnetic field
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DOI：
10.1103/physreva.77.043414
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发表时间：
2008-04
影响因子：
2.9
通讯作者：
Xiaofeng Wang;H. Qiao
中科院分区：
文献类型：
--
作者：
Xiaofeng Wang;H. Qiao
研究了氦原子在直至$2.35\ifmmode\times\else\texttimes\fi{}{10}^{7}\phantom{\rule{0.3em}{0ex}}\mathrm{T}$的强磁场中的0^1}、^1}(-1)和{1}(-2)+}态能级。我们的计算方法是基于一组对不同场强进行非线性优化的各向异性Hylleraas-Gauss轨道的组态相互作用(CI)方法。我们的方法与柱坐标下的高斯型基函数的CI方法进行了详细的比较。讨论了Hylleraas-Gauss基相对于高斯基的优点。
The energy levels involving the $^{1}0^{+}$, $^{1}(\ensuremath{-}1)^{+}$, and $^{1}(\ensuremath{-}2)^{+}$ states of the helium atom in strong magnetic fields up to $2.35\ifmmode\times\else\texttimes\fi{}{10}^{7}\phantom{\rule{0.3em}{0ex}}\mathrm{T}$ are investigated. Our computational approach is a configuration-interaction (CI) method based on a set of anisotropic Hylleraas-Gaussian orbitals nonlinearly optimized for different field strength. A detailed comparison between our method and the CI method with the Gaussian-type basis functions in cylindrical coordinates is made. The advantages of the Hylleraas-Gaussian basis over the Gaussian basis are discussed.