On the distinguishable cluster approximation for triple excitations.
On the distinguishable cluster approximation for triple excitations.
复制标题
关于三重激发的可区分簇近似。
DOI:
10.1063/1.5096343
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Andreas Köhn
中科院分区:
文献类型:
--
作者:
D. Kats;Andreas Köhn
The distinguishable cluster approximation applied to coupled cluster doubles equations greatly improves absolute and relative energies. We apply the same approximation to the triples equations and demonstrate that it can also improve the results of the coupled cluster method with singles, doubles, and triples. The resulting method has a nominal computational scaling of O(N7) in the real-space representation, and is orbital invariant, size extensive, and exact for three electrons.