从自然轨道和它们的占用数来重建顶部的两电子密度
Jerzy Cioslowski1,2, Krzysztof Strasburger3
1Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, Poland.
Journal of chemical theory and computation
|April 8, 2025
概括
自然轨道的空间导数 (NO) 编码关于两电子密度的信息. 这种方法重建了电子密度,并为使用NOs的电子结构理论提供了新的一致性检查.
科学领域:
- 量子化学 是一个量子化学.
- 计算物理 计算物理
背景情况:
- 自然轨道 (Natural Orbitals,简称NOs) 在描述电子相关性方面是至关重要的.
- 在顶部的两电子密度 (Φ2(r)) 提供了关于电子配对的见解.
- 现有的从NO重建电子密度的方法有局限性.
研究的目的:
- 探索NOs的空间导数与两电子密度之间的关系.
- 开发一种用于从NOs.重建两电子密度的新方法.
- 为电子结构理论引入新的一致性检查.
主要方法:
- 计算NOs在其节点表面的空间导数.
- 使用涉及NO及其职业号码的身份.
- 重建两个电子密度 Φ2(r).
主要成果:
- NOs的空间导数近似于顶部的两个电子密度.
- 这种近似变得精确的无限数的NOs.
- 确定了一种方法来检索正确重建的乘法常数.
结论:
- 的空间导数提供了一条重建电子密度的途径.
- 这为像一个电子减少密度矩阵理论这样的理论提供了有价值的一致性检查.
- 这些发现增强了NOs在电子结构计算中的实用性.
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