论文标题
时间依赖性的优化耦合群集方法用于多电体动力学III:二阶多体扰动近似
Time-dependent optimized coupled-cluster method for multielectron dynamics III: A second-order many-body perturbation approximation
论文作者
论文摘要
我们报告了使用优化的正交轨道函数(称为时间依赖性优化的二阶多体扰动理论[TD-EMP2]),成功实施了时间依赖性的二阶多体扰动理论,以与相对较大的化学系统联系起来,以研究激烈的激光驱动的多电极动力学。我们将此方法应用于AR的强场电离和高阶谐波(HHG)。计算结果是针对时间依赖时间依赖性的完整空间自洽场(TD-CASSCF),时间依赖性优化的优化耦合群集双重(TD-OCCD)的基准标准的,以及时间依赖的Hartree-fock(TDHF)方法,以及单个活动(SAE)的方法,以及单个活动(SAE)模型,以探索电子的角色。
We report successful implementation of the time-dependent second-order many-body perturbation theory using optimized orthonormal orbital functions called time-dependent optimized second-order many-body perturbation theory [TD-OMP2] to reach out to relatively larger chemical systems for the study of intense-laser-driven multielectron dynamics. We apply this method to strong-field ionization and high-order harmonic generation (HHG) of Ar. The calculation results are benchmarked against ab initio time-dependent complete-active-space self-consistent field (TD-CASSCF), time-dependent optimized coupled-cluster double (TD-OCCD), and time-dependent Hartree-Fock (TDHF) methods, as well as a single active electron (SAE) model to explore the role of electron correlation.