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.
中科院分区:
文献类型:
--
作者:
Coe, Jeremy P.;Carrascosa, Andres Moreno;Simmermacher, Mats;Kirrander, Adam;Paterson, Martin J.
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.
登录
查看更多内容
影响因子:
5.5
作者:
Coe, J. P.;Paterson, M. J.
通讯作者:
Paterson, M. J.
影响因子:
4.4
作者:
Gidofalvi, Gergely;Mazziotti, David A.
通讯作者:
Mazziotti, David A.
影响因子:
4.4
作者:
Coe, Jeremy P.;Taylor, Daniel J.;Paterson, Martin J.
通讯作者:
Paterson, Martin J.
影响因子:
4.1
作者:
Greer, JC
通讯作者:
Greer, JC
影响因子:
5.5
作者:
Coe, J. P.
通讯作者:
Coe, J. P.