arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2005.10129physics.chem-ph
收藏

分子双电子积分近似中原子密度拟合基函数的优化

Optimization of atomic density-fitting basis functions for molecular two-electron integral approximations

Dimitri N. Laikov

摘要:

原子密度拟合基函数的优化的一般程序的设计与准确性和数值稳定性之间的平衡。给定一个电子的波函数和能量,权重被分配给产品密度,建模他们的贡献的交换和二阶相关能量,和一个简单的加权误差测量最小化。对广义压缩高斯辅助基组进行优化以匹配波函数基组[D. N.莱科夫,西奥。138,40(2019)]在标量相对论近似中对所有102种元素[D. N. Laikov,J. Chem. Phys. 150,061102(2019)]。

英文摘要:

A general procedure for the optimization of atomic density-fitting basis functions is designed with the balance between accuracy and numerical stability in mind. Given one-electron wavefunctions and energies, weights are assigned to the product densities, modeling their contribution to the exchange and second-order correlation energy, and a simple weighted error measure is minimized. Generally-contracted Gaussian auxiliary basis sets are optimized to match the wavefunction basis sets [D. N. Laikov, Theor. Chem. Acc. 138, 40 (2019)] for all 102 elements in a scalar-relativistic approximation [D. N. Laikov, J. Chem. Phys. 150, 061102 (2019)].

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑