Efficient Computation of Two-Electron Reduced Density Matrices via Selected Configuration Interaction.

Efficient Computation of Two-Electron Reduced Density Matrices via Selected Configuration Interaction.
复制标题

通过选定的配置相互作用有效计算二电子约简密度矩阵。

DOI:
10.1021/acs.jctc.2c00738
复制
发表时间:
2022-11-08
影响因子:
5.5
通讯作者:
Paterson, Martin J.
Paterson, Martin J.
中科院分区:
化学1区
文献类型:
--
作者:
Coe, Jeremy P.;Carrascosa, Andres Moreno;Simmermacher, Mats;Kirrander, Adam;Paterson, Martin J.

文献摘要

参考文献

被引文献

相似文献

我们创建了一个方法来有效地计算两个电子的约化密度矩阵(2-RDM)使用选定的配置相互作用波函数。这是证明使用蒙特卡罗组态相互作用(MCCI)的具体例子。2-RDM的计算加速使用的想法,从快速实现的全配置交互(FCI)和最近的进展,在实现Slater-Condon规则,使用硬件按位操作。该方法能够比较MCCI和截短的C12-RDM与一系列分子的FCI值,其包括拉伸键和激发态。能量、波函数和2-RDM的准确性被认为表现出类似的行为。我们发现,MCCI可以达到足够的精度的2-RDM使用显着较少的配置比截断CI,特别是对于系统具有较强的多参考字符。
We create an approach to efficiently calculate two-electron reduced density matrices (2-RDMs) using selected configuration interaction wavefunctions. This is demonstrated using the specific example of Monte Carlo configuration interaction (MCCI). The computation of the 2-RDMs is accelerated by using ideas from fast implementations of full configuration interaction (FCI) and recent advances in implementing the Slater–Condon rules using hardware bitwise operations. This method enables a comparison of MCCI and truncated CI 2-RDMs with FCI values for a range of molecules, which includes stretched bonds and excited states. The accuracy in energies, wavefunctions, and 2-RDMs is seen to exhibit a similar behavior. We find that MCCI can reach sufficient accuracy of the 2-RDM using significantly fewer configurations than truncated CI, particularly for systems with strong multireference character.
DOI: 10.1021/acs.jctc.5b00543
发表时间: 2015-09-01
影响因子: 5.5
作者:
Coe, J. P.;Paterson, M. J.
通讯作者: Paterson, M. J.
DOI: 10.1063/1.2983652
发表时间: 2008-10-07
影响因子: 4.4
作者:
Gidofalvi, Gergely;Mazziotti, David A.
通讯作者: Mazziotti, David A.
DOI: 10.1063/1.4767052
发表时间: 2012-11-21
影响因子: 4.4
作者:
Coe, Jeremy P.;Taylor, Daniel J.;Paterson, Martin J.
通讯作者: Paterson, Martin J.
DOI: 10.1006/jcph.1998.5953
发表时间: 1998-10-10
影响因子: 4.1
作者:
Greer, JC
通讯作者: Greer, JC
DOI: 10.1021/acs.jctc.8b00849
发表时间: 2018-11-01
影响因子: 5.5
作者:
Coe, J. P.
通讯作者: Coe, J. P.