Confined quantum systems: spectral properties of two-electron quantum dots
Confined quantum systems: spectral properties of two-electron quantum dots
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受限量子系统：双电子量子点的光谱特性
DOI：
10.1088/0953-8984/15/32/310
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
G. Diercksen
中科院分区：
文献类型：
--
作者：
T. Sako;G. Diercksen
通过采用大笛卡尔各向异性高斯基组和完整 CI 波函数的量子化学构型相互作用 (CI) 方法，研究了由各向异性谐振子势限制的两个电子的光谱、电子密度分布和基态相关能量对于不同限制强度 ω 的情况。显示所选电子态和限制参数的能级图和电子密度分布。在所有情况下，总能量和能级之间的间距随着 ω 的增加而增加。能级结构无法通过关于 ω 的缩放来匹配。基态的相关能在大小上与氦原子的相关能相当。随 ω 的增加而增加。相关能量相对于基态总能量的百分比比氦原子大得多。
The spectrum, electron-density distribution and ground-state correlation energy of two electrons confined by an anisotropic harmonic oscillator potential have been studied for different confinement strengths ω by using the quantum chemical configuration interaction (CI) method employing a large Cartesian anisotropic Gaussian basis set and a full CI wavefunction. Energy level diagrams and electron-density distributions are displayed for selected electronic states and confinement parameters. The total energy and spacing between energy levels increase in all cases with increasing ω. The energy level structure cannot be matched by scaling with respect to ω. The correlation energy of the ground state is comparable in magnitude to that of the helium atom. It increases for increasing ω. The percentage of the correlation energy with respect to the total energy of the ground state is considerably larger than that of the helium atom.